| XAA | BCBS of Alabama |
| XAB | BCBS of Alabama |
| XAC | BCBS of Alabama |
| XAD | BCBS of Alabama |
| XAE | BCBS of Alabama |
| XAF | BCBS of Alabama |
| XAG | BCBS of Alabama |
| XAI | BCBS of Alabama |
| XAJ | BCBS of Alabama |
| XAK | BCBS of Alabama |
| XAL | BCBS of Alabama |
| XAM | BCBS of Alabama |
| XAP | BCBS of Alabama |
| XAQ | BCBS of Alabama |
| XAR | BCBS of Alabama |
| XAS | BCBS of Alabama |
| XAT | BCBS of Alabama |
| XAV | BCBS of Alabama |
| XAX | BCBS of Alabama |
| XAY | BCBS of Alabama |
| XAZ | BCBS of Alabama |
| XNC | BCBS of North Carolina |
| XHI | BCBS of Rhode Island |
| XIV | BCBS of Rhode Island |
| XWK | BCBS of Rhode Island |
| XWM | BCBS of Rhode Island |
| XAH | BCBS of Arizona |
| XBB | BCBS of Arizona |
| XBC | BCBS of Arizona |
| XBD | BCBS of Arizona |
| XBF | BCBS of Arizona |
| XBH | BCBS of Arizona |
| XBK | BCBS of Arizona |
| XBM | BCBS of Arizona |
| XBN | BCBS of Arizona |
| XBO | BCBS of Arizona |
| XBP | BCBS of Arizona |
| XBR | BCBS of Arizona |
| XBS | BCBS of Arizona |
| XBU | BCBS of Arizona |
| XBX | BCBS of Arizona |
| XBY | BCBS of Arizona |
| XHK | BCBS of Arizona |
| XCA | Arkansas BCBS |
| XCB | Arkansas BCBS |
| XCC | Arkansas BCBS |
| XCF | Arkansas BCBS |
| XCG | Arkansas BCBS |
| XCH | Arkansas BCBS |
| XCJ | Arkansas BCBS |
| XCK | Arkansas BCBS |
| XCL | Arkansas BCBS |
| XCM | Arkansas BCBS |
| XCP | Arkansas BCBS |
| XCQ | Arkansas BCBS |
| XCR | Arkansas BCBS |
| XCS | Arkansas BCBS |
| XCU | Arkansas BCBS |
| XCW | Arkansas BCBS |
| XCX | Arkansas BCBS |
| XND | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNE | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNF | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNH | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNJ | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNM | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNN | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNO | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNP | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNR | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNT | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XNV | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XVT | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XYM | Regence BCBS(Oregon/Idaho/Utah/Washington) |
| XCO | BCBS of Minnesota |
| XZA | BCBS of Minnesota |
| XZC | BCBS of Minnesota |
| XZD | BCBS of Minnesota |
| XZE | BCBS of Minnesota |
| XZH | BCBS of Minnesota |
| XZL | BCBS of Minnesota |
| XZQ | BCBS of Minnesota |
| XZR | BCBS of Minnesota |
| XZU | BCBS of Minnesota |
| XZX | BCBS of Minnesota |
| XAU | Anthem BCBS of Colorado |
| XFA | Anthem BCBS of Colorado |
| XFB | Anthem BCBS of Colorado |
| XFC | Anthem BCBS of Colorado |
| XFD | Anthem BCBS of Colorado |
| XFE | Anthem BCBS of Colorado |
| XFF | Anthem BCBS of Colorado |
| XFG | Anthem BCBS of Colorado |
| XFH | Anthem BCBS of Colorado |
| XFI | Anthem BCBS of Colorado |
| XFJ | Anthem BCBS of Colorado |
| XFK | Anthem BCBS of Colorado |
| XFL | Anthem BCBS of Colorado |
| XFM | Anthem BCBS of Colorado |
| XFN | Anthem BCBS of Colorado |
| XFO | Anthem BCBS of Colorado |
| XFP | Anthem BCBS of Colorado |
| XFS | Anthem BCBS of Colorado |
| XFT | Anthem BCBS of Colorado |
| XFW | Anthem BCBS of Colorado |
| XFX | Anthem BCBS of Colorado |
| XFY | Anthem BCBS of Colorado |
| XFZ | Anthem BCBS of Colorado |
| XRU | Anthem BCBS of Colorado |
| XTT | Anthem BCBS of Colorado |
| XWD | Anthem BCBS of Colorado |
| XWU | Anthem BCBS of Colorado |
| XWX | Anthem BCBS of Colorado |
| XYB | BCBS of Michigan |
| XYD | BCBS of Michigan |
| XYE | BCBS of Michigan |
| XYF | BCBS of Michigan |
| XYG | BCBS of Michigan |
| XYH | BCBS of Michigan |
| XYJ | BCBS of Michigan |
| XYK | BCBS of Michigan |
| XYL | BCBS of Michigan |
| XYP | BCBS of Michigan |
| XYQ | BCBS of Michigan |
| XYR | BCBS of Michigan |
| XYS | BCBS of Michigan |
| XYU | BCBS of Michigan |
| XYV | BCBS of Michigan |
| XYW | BCBS of Michigan |
| XYX | BCBS of Michigan |
| XYY | BCBS of Michigan |
| XHA | Highmark BCBS of Delaware |
| XHC | Highmark BCBS of Delaware |
| XHD | Highmark BCBS of Delaware |
| XHG | Highmark BCBS of Delaware |
| XHH | Highmark BCBS of Delaware |
| XHP | Highmark BCBS of Delaware |
| XSA | BCBS of Kansas |
| XSB | BCBS of Kansas |
| XSD | BCBS of Kansas |
| XSE | BCBS of Kansas |
| XSF | BCBS of Kansas |
| XSH | BCBS of Kansas |
| XSJ | BCBS of Kansas |
| XSL | BCBS of Kansas |
| XSM | BCBS of Kansas |
| XSN | BCBS of Kansas |
| XST | BCBS of Kansas |
| XSV | BCBS of Kansas |
| XSZ | BCBS of Kansas |
| XCI | BCBS of Massachusetts |
| XHN | BCBS of Massachusetts |
| XRA | BCBS of Massachusetts |
| XRX | BCBS of Massachusetts |
| XSX | BCBS of Massachusetts |
| XXA | BCBS of Massachusetts |
| XXB | BCBS of Massachusetts |
| XXC | BCBS of Massachusetts |
| XXD | BCBS of Massachusetts |
| XXE | BCBS of Massachusetts |
| XXF | BCBS of Massachusetts |
| XXG | BCBS of Massachusetts |
| XXH | BCBS of Massachusetts |
| XXI | BCBS of Massachusetts |
| XXK | BCBS of Massachusetts |
| XXM Blue Cross Prefix | BCBS of Massachusetts |
| XXN | BCBS of Massachusetts |
| XXP | BCBS of Massachusetts |
| XXQ | BCBS of Massachusetts |
| XXR | BCBS of Massachusetts |
| XXS | BCBS of Massachusetts |
| XXT | BCBS of Massachusetts |
| XXU | BCBS of Massachusetts |
| XXV | BCBS of Massachusetts |
| XXW | BCBS of Massachusetts |
| XXY | BCBS of Massachusetts |
| XXZ | BCBS of Massachusetts |
| XTY | BCBS of Texas |
| XUA | BCBS of Louisiana |
| XUB | BCBS of Louisiana |
| XUC | BCBS of Louisiana |
| XUD | BCBS of Louisiana |
| XUE | BCBS of Louisiana |
| XUF | BCBS of Louisiana |
| XUG | BCBS of Louisiana |
| XUH | BCBS of Louisiana |
| XUI | BCBS of Louisiana |
| XUJ | BCBS of Louisiana |
| XUK | BCBS of Louisiana |
| XUL | BCBS of Louisiana |
| XUM | BCBS of Louisiana |
| XUN | BCBS of Louisiana |
| XUP | BCBS of Louisiana |
| XUQ | BCBS of Louisiana |
| XUR | BCBS of Louisiana |
| XUS | BCBS of Louisiana |
| XUT | BCBS of Louisiana |
| XUU | BCBS of Louisiana |
| XUV | BCBS of Louisiana |
| XUW | BCBS of Louisiana |
| XUX | BCBS of Louisiana |
| XUY | BCBS of Louisiana |
| XYC | BCBS of Oklahoma |
| XAO | Blueshield of California |
| XEA | Blueshield of California |
| XEB | Blueshield of California |
| XEC | Blueshield of California |
| XED | Blueshield of California |
| XEE | Blueshield of California |
| XEF | Blueshield of California |
| XEG | Blueshield of California |
| XEH | Blueshield of California |
| XEI | Blueshield of California |
| XEJ | Blueshield of California |
| XEK | Blueshield of California |
| XEL | Blueshield of California |
| XEM | Blueshield of California |
| XEN | Blueshield of California |
| XEO | Blueshield of California |
| XEP | Blueshield of California |
| XEQ | Blueshield of California |
| XER | Blueshield of California |
| XES | Blueshield of California |
| XET | Blueshield of California |
| XEU | Blueshield of California |
| XEV | Blueshield of California |
| XEW | Blueshield of California |
| XEX | Blueshield of California |
| XEY | Blueshield of California |
| XEZ | Blueshield of California |
| XFU | Blueshield of California |
| XHU | Blueshield of California |
| XKB | Blueshield of California |
| XNK | Blueshield of California |
| XPI | Blueshield of California |
| XRD | Blueshield of California |
| XRT | Blueshield of California |
| XSW | Blueshield of California |
| XBW | Anthem BCBS of Wisconsin |
| XNA | Anthem BCBS of Wisconsin |
| XRI | Anthem BCBS of Wisconsin |
| XWH | Anthem BCBS of Wisconsin |
| XWP | Anthem BCBS of Wisconsin |
| XHO | Bluecross of Idaho |
| XID | Bluecross of Idaho |
| XMA | Bluecross of Idaho |
| XMB | Bluecross of Idaho |
| XMD | Bluecross of Idaho |
| XME | Bluecross of Idaho |
| XMF | Bluecross of Idaho |
| XMG | Bluecross of Idaho |
| XMH | Bluecross of Idaho |
| XMI | Bluecross of Idaho |
| XMJ | Bluecross of Idaho |
| XMK | Bluecross of Idaho |
| XML | Bluecross of Idaho |
| XMM | Bluecross of Idaho |
| XMN | Bluecross of Idaho |
| XMO | Bluecross of Idaho |
| XMP | Bluecross of Idaho |
| XMQ | Bluecross of Idaho |
| XMR | Bluecross of Idaho |
| XMS | Bluecross of Idaho |
| XMT | Bluecross of Idaho |
| XMU | Bluecross of Idaho |
| XMV | Bluecross of Idaho |
| XMX | Bluecross of Idaho |
| XMY | Bluecross of Idaho |
| XPO | Bluecross of Idaho |
| XPQ | Bluecross of Idaho |
| XGA | Anthem BCBS of Georgia |
| XHW | Anthem BCBS of Georgia |
| XKD | Anthem BCBS of Georgia |
| XKE | Anthem BCBS of Georgia |
| XKF | Anthem BCBS of Georgia |
| XKG | Anthem BCBS of Georgia |
| XKI | Anthem BCBS of Georgia |
| XKJ | Anthem BCBS of Georgia |
| XKK | Anthem BCBS of Georgia |
| XKL | Anthem BCBS of Georgia |
| XKN | Anthem BCBS of Georgia |
| XKO | Anthem BCBS of Georgia |
| XKP | Anthem BCBS of Georgia |
| XKR | Anthem BCBS of Georgia |
| XKS | Anthem BCBS of Georgia |
| XKT | Anthem BCBS of Georgia |
| XKU | Anthem BCBS of Georgia |
| XKV | Anthem BCBS of Georgia |
| XKW | Anthem BCBS of Georgia |
| XKX | Anthem BCBS of Georgia |
| XKY | Anthem BCBS of Georgia |
| XKZ | Anthem BCBS of Georgia |
| XRH | Anthem BCBS of Georgia |
| XRS | Anthem BCBS of Georgia |
| XSU | Anthem BCBS of Georgia |
| XTQ | Anthem BCBS of Georgia |
| XVY | Anthem BCBS of Georgia |
| XAW | Anthem Bluecross of California |
| XDA | Anthem Bluecross of California |
| XDB | Anthem Bluecross of California |
| XDC | Anthem Bluecross of California |
| XDD | Anthem Bluecross of California |
| XDE | Anthem Bluecross of California |
| XDF | Anthem Bluecross of California |
| XDH | Anthem Bluecross of California |
| XDI | Anthem Bluecross of California |
| XDJ | Anthem Bluecross of California |
| XDK | Anthem Bluecross of California |
| XDL | Anthem Bluecross of California |
| XDM | Anthem Bluecross of California |
| XDN | Anthem Bluecross of California |
| XDO | Anthem Bluecross of California |
| XDP | Anthem Bluecross of California |
| XDQ | Anthem Bluecross of California |
| XDR | Anthem Bluecross of California |
| XDS | Anthem Bluecross of California |
| XDT | Anthem Bluecross of California |
| XDU | Anthem Bluecross of California |
| XDW | Anthem Bluecross of California |
| XDX | Anthem Bluecross of California |
| XDZ | Anthem Bluecross of California |
| XHL | Anthem Bluecross of California |
| XHX | Anthem Bluecross of California |
| XIP | Anthem Bluecross of California |
| XKM | Anthem Bluecross of California |
| XKQ | Anthem Bluecross of California |
| XLO | Anthem Bluecross of California |
| XNL | Anthem Bluecross of California |
| XNX | Anthem Bluecross of California |
| XRP | Anthem Bluecross of California |
| XRR | Anthem Bluecross of California |
| XTS | Anthem Bluecross of California |
| XXJ | Anthem Bluecross of California |
| XYO | Anthem Bluecross of California |
| XHT | Premera BCBS of Alaska |
| XKH | Premera BCBS of Alaska |
| XVD | Premera BCBS of Alaska |
| XWT | Premera BCBS of Alaska |
| XLV | Wellmark BCBS of South Dakota/Iowa |
| XMZ | Wellmark BCBS of South Dakota/Iowa |
| XQA | Wellmark BCBS of South Dakota/Iowa |
| XQB | Wellmark BCBS of South Dakota/Iowa |
| XQC | Wellmark BCBS of South Dakota/Iowa |
| XQD | Wellmark BCBS of South Dakota/Iowa |
| XQE | Wellmark BCBS of South Dakota/Iowa |
| XQF | Wellmark BCBS of South Dakota/Iowa |
| XQG | Wellmark BCBS of South Dakota/Iowa |
| XQH | Wellmark BCBS of South Dakota/Iowa |
| XQI | Wellmark BCBS of South Dakota/Iowa |
| XQJ | Wellmark BCBS of South Dakota/Iowa |
| XQK | Wellmark BCBS of South Dakota/Iowa |
| XQL | Wellmark BCBS of South Dakota/Iowa |
| XQM | Wellmark BCBS of South Dakota/Iowa |
| XQN | Wellmark BCBS of South Dakota/Iowa |
| XQO | Wellmark BCBS of South Dakota/Iowa |
| XQP | Wellmark BCBS of South Dakota/Iowa |
| XQQ | Wellmark BCBS of South Dakota/Iowa |
| XQR | Wellmark BCBS of South Dakota/Iowa |
| XQS | Wellmark BCBS of South Dakota/Iowa |
| XQT | Wellmark BCBS of South Dakota/Iowa |
| XQU | Wellmark BCBS of South Dakota/Iowa |
| XQV | Wellmark BCBS of South Dakota/Iowa |
| XQW | Wellmark BCBS of South Dakota/Iowa |
| XQX | Wellmark BCBS of South Dakota/Iowa |
| XQY | Wellmark BCBS of South Dakota/Iowa |
| XQZ | Wellmark BCBS of South Dakota/Iowa |
| XTX | Wellmark BCBS of South Dakota/Iowa |
| XWI | Wellmark BCBS of South Dakota/Iowa |
| XWS | Wellmark BCBS of South Dakota/Iowa |
| XIA | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIB | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIC | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIE | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIF | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIG | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIH | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XII | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIJ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIK | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIL | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIM | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIN | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIO | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIQ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIR | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XIS | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XRZ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XWC | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XWO | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XWR | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XWV | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XWY | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XWZ | Carefirst BCBS(Maryland/District of Columbia/Northern Virginia) |
| XRM | Capital Bluecross of Pennsylvania |
| XJA | Florida Blue |
| XJB | Florida Blue |
| XJD | Florida Blue |
| XJE | Florida Blue |
| XJF | Florida Blue |
| XJG | Florida Blue |
| XJH | Florida Blue |
| XJI | Florida Blue |
| XJJ | Florida Blue |
| XJK | Florida Blue |
| XJL | Florida Blue |
| XJM | Florida Blue |
| XJN | Florida Blue |
| XJO | Florida Blue |
| XJP | Florida Blue |
| XJQ | Florida Blue |
| XJR | Florida Blue |
| XJS | Florida Blue |
| XJT | Florida Blue |
| XJU | Florida Blue |
| XJW | Florida Blue |
| XJX | Florida Blue |
| XJY | Florida Blue |
| XJZ | Florida Blue |
| XHS | BCBS of Illinois |
| XKC | BCBS of Illinois |
| XMW | BCBS of Illinois |
| XNB | BCBS of Illinois |
| XOA | BCBS of Illinois |
| XOB | BCBS of Illinois |
| XOC | BCBS of Illinois |
| XOD | BCBS of Illinois |
| XOE | BCBS of Illinois |
| XOF | BCBS of Illinois |
| XOG | BCBS of Illinois |
| XOH | BCBS of Illinois |
| XOJ | BCBS of Illinois |
| XOK | BCBS of Illinois |
| XOL | BCBS of Illinois |
| XOM | BCBS of Illinois |
| XON | BCBS of Illinois |
| XOO | BCBS of Illinois |
| XOP | BCBS of Illinois |
| XOQ | BCBS of Illinois |
| XOR | BCBS of Illinois |
| XOS | BCBS of Illinois |
| XOT | BCBS of Illinois |
| XOU | BCBS of Illinois |
| XOW | BCBS of Illinois |
| XOX | BCBS of Illinois |
| XOY | BCBS of Illinois |
| XOZ | BCBS of Illinois |
| XTW | BCBS of Illinois |
| XVS | BCBS of Illinois |
| XVU | BCBS of Illinois |
| XYT | BCBS of Illinois |
| XBJ | Empire BCBS of New York |
| XGQ | Empire BCBS of New York |
| XGW | Empire BCBS of New York |
| XGX | Empire BCBS of New York |
| XHZ | Empire BCBS of New York |
| XLU | Empire BCBS of New York |
| XNU | Empire BCBS of New York |
| XNZ | Empire BCBS of New York |
| XWG | Empire BCBS of New York |
| XHF | Anthem BCBS of Virginia |
| XHY | Anthem BCBS of Virginia |
| XRJ | Anthem BCBS of Virginia |
| XRK | Anthem BCBS of Virginia |
| XRN | Anthem BCBS of Virginia |
| XRQ | Anthem BCBS of Virginia |
| XSY | Anthem BCBS of Virginia |
| XTO | Anthem BCBS of Virginia |
| XTP | Anthem BCBS of Virginia |
| XYA | Anthem BCBS of Virginia |
| XBA | Alpha Prefix not assigned or unallocated |
| XBE | Alpha Prefix not assigned or unallocated |
| XBG | Alpha Prefix not assigned or unallocated |
| XBI | Alpha Prefix not assigned or unallocated |
| XBL | Alpha Prefix not assigned or unallocated |
| XBQ | Alpha Prefix not assigned or unallocated |
| XBT | Alpha Prefix not assigned or unallocated |
| XBV | Alpha Prefix not assigned or unallocated |
| XBZ | Alpha Prefix not assigned or unallocated |
| XCE | Alpha Prefix not assigned or unallocated |
| XCN | Alpha Prefix not assigned or unallocated |
| XCV | Alpha Prefix not assigned or unallocated |
| XCY | Alpha Prefix not assigned or unallocated |
| XCZ | Alpha Prefix not assigned or unallocated |
| XFV | Alpha Prefix not assigned or unallocated |
| XHE | Alpha Prefix not assigned or unallocated |
| XHM | Alpha Prefix not assigned or unallocated |
| XIT | Alpha Prefix not assigned or unallocated |
| XIU | Alpha Prefix not assigned or unallocated |
| XIY | Alpha Prefix not assigned or unallocated |
| XIZ | Alpha Prefix not assigned or unallocated |
| XJC | Alpha Prefix not assigned or unallocated |
| XKA | Alpha Prefix not assigned or unallocated |
| XNI | Alpha Prefix not assigned or unallocated |
| XNY | Alpha Prefix not assigned or unallocated |
| XOI | Alpha Prefix not assigned or unallocated |
| XOV | Alpha Prefix not assigned or unallocated |
| XPH | Alpha Prefix not assigned or unallocated |
| XPJ | Alpha Prefix not assigned or unallocated |
| XPL | Alpha Prefix not assigned or unallocated |
| XPM | Alpha Prefix not assigned or unallocated |
| XPT | Alpha Prefix not assigned or unallocated |
| XPY | Alpha Prefix not assigned or unallocated |
| XRF | Alpha Prefix not assigned or unallocated |
| XSC | Alpha Prefix not assigned or unallocated |
| XSG | Alpha Prefix not assigned or unallocated |
| XSI | Alpha Prefix not assigned or unallocated |
| XSK | Alpha Prefix not assigned or unallocated |
| XSP | Alpha Prefix not assigned or unallocated |
| XSQ | Alpha Prefix not assigned or unallocated |
| XSR | Alpha Prefix not assigned or unallocated |
| XSS | Alpha Prefix not assigned or unallocated |
| XTR | Alpha Prefix not assigned or unallocated |
| XUZ | Alpha Prefix not assigned or unallocated |
| XVK | Alpha Prefix not assigned or unallocated |
| XVN | Alpha Prefix not assigned or unallocated |
| XVO | Alpha Prefix not assigned or unallocated |
| XVX | Alpha Prefix not assigned or unallocated |
| XVZ | Alpha Prefix not assigned or unallocated |
| XWA | Alpha Prefix not assigned or unallocated |
| XWB | Alpha Prefix not assigned or unallocated |
| XWW | Alpha Prefix not assigned or unallocated |
| XXL | Alpha Prefix not assigned or unallocated |
| XXX | Alpha Prefix not assigned or unallocated |
| XYI | Alpha Prefix not assigned or unallocated |
| XZB | Alpha Prefix not assigned or unallocated |
| XZF | Alpha Prefix not assigned or unallocated |
| XZG | Alpha Prefix not assigned or unallocated |
| XZI | Alpha Prefix not assigned or unallocated |
| XZJ | Alpha Prefix not assigned or unallocated |
| XZK | Alpha Prefix not assigned or unallocated |
| XZM | Alpha Prefix not assigned or unallocated |
| XZN | Alpha Prefix not assigned or unallocated |
| XZO | Alpha Prefix not assigned or unallocated |
| XZP | Alpha Prefix not assigned or unallocated |
| XZS | Alpha Prefix not assigned or unallocated |
| XZT | Alpha Prefix not assigned or unallocated |
| XZV | Alpha Prefix not assigned or unallocated |
| XZW | Alpha Prefix not assigned or unallocated |
| XZY | Alpha Prefix not assigned or unallocated |
| XZZ | Alpha Prefix not assigned or unallocated |
| XHJ | Anthem BCBS of Indiana |
| XPA | Anthem BCBS of Indiana |
| XPB | Anthem BCBS of Indiana |
| XPC | Anthem BCBS of Indiana |
| XPD | Anthem BCBS of Indiana |
| XPE | Anthem BCBS of Indiana |
| XPF | Anthem BCBS of Indiana |
| XPG | Anthem BCBS of Indiana |
| XPK | Anthem BCBS of Indiana |
| XPR | Anthem BCBS of Indiana |
| XPU | Anthem BCBS of Indiana |
| XPV | Anthem BCBS of Indiana |
| XPW | Anthem BCBS of Indiana |
| XPX | Anthem BCBS of Indiana |
| XRC | Anthem BCBS of Indiana |
| XUO | Anthem BCBS of Indiana |
| XWQ | Anthem BCBS of Indiana |
| XXO | Anthem BCBS of Indiana |
| XDY | Anthem BCBS of Kentucky |
| XHB | Anthem BCBS of Kentucky |
| XLJ | Anthem BCBS of Kentucky |
| XPS | Anthem BCBS of Kentucky |
| XTA | Anthem BCBS of Kentucky |
| XTB | Anthem BCBS of Kentucky |
| XTC | Anthem BCBS of Kentucky |
| XTD | Anthem BCBS of Kentucky |
| XTE | Anthem BCBS of Kentucky |
| XTF | Anthem BCBS of Kentucky |
| XTG | Anthem BCBS of Kentucky |
| XTH | Anthem BCBS of Kentucky |
| XTI | Anthem BCBS of Kentucky |
| XTJ | Anthem BCBS of Kentucky |
| XTK | Anthem BCBS of Kentucky |
| XTN | Anthem BCBS of Kentucky |
| XTV | Anthem BCBS of Kentucky |
| XJV | Anthem BCBS of Maine |
| XMC | Anthem BCBS of Maine |
| XRW | Anthem BCBS of Maine |
| XVA | Anthem BCBS of Maine |
| XVB | Anthem BCBS of Maine |
| XVC | Anthem BCBS of Maine |
| XVE | Anthem BCBS of Maine |
| XVF | Anthem BCBS of Maine |
| XVG | Anthem BCBS of Maine |
| XVH | Anthem BCBS of Maine |
| XVI | Anthem BCBS of Maine |
| XVJ | Anthem BCBS of Maine |
| XVL | Anthem BCBS of Maine |
| XVM | Anthem BCBS of Maine |
| XVP | Anthem BCBS of Maine |
| XVR | Anthem BCBS of Maine |
| XVW | Anthem BCBS of Maine |
| XAN | Anthem BCBS of Missouri |
| XIX | Anthem BCBS of Missouri |
| XWE | Anthem BCBS of Missouri |
| XWF | Anthem BCBS of Missouri |
| XFR | Anthem BCBS of Nevada |
| XSO | Anthem BCBS of Nevada |
| XDV | Anthem BCBS of Ohio |
| XIW | Anthem BCBS of Ohio |
| XNW | Anthem BCBS of Ohio |
| XPN | Anthem BCBS of Ohio |
| XPZ | Anthem BCBS of Ohio |
| XRB | Anthem BCBS of Ohio |
| XRE | Anthem BCBS of Ohio |
| XRG | Anthem BCBS of Ohio |
| XRL | Anthem BCBS of Ohio |
| XRO | Anthem BCBS of Ohio |
| XRV | Anthem BCBS of Ohio |
| XTL | Anthem BCBS of Ohio |
| XTU | Anthem BCBS of Ohio |
| XTZ | Anthem BCBS of Ohio |
| XWL | Anthem BCBS of Ohio |
| XCD | Anthem BCBS of Connecticut |
| XCT | Anthem BCBS of Connecticut |
| XGB | Anthem BCBS of Connecticut |
| XGC | Anthem BCBS of Connecticut |
| XGD | Anthem BCBS of Connecticut |
| XGE | Anthem BCBS of Connecticut |
| XGF | Anthem BCBS of Connecticut |
| XGG | Anthem BCBS of Connecticut |
| XGH | Anthem BCBS of Connecticut |
| XGI | Anthem BCBS of Connecticut |
| XGJ | Anthem BCBS of Connecticut |
| XGK | Anthem BCBS of Connecticut |
| XGL | Anthem BCBS of Connecticut |
| XGM | Anthem BCBS of Connecticut |
| XGN | Anthem BCBS of Connecticut |
| XGO | Anthem BCBS of Connecticut |
| XGP | Anthem BCBS of Connecticut |
| XGR | Anthem BCBS of Connecticut |
| XGS | Anthem BCBS of Connecticut |
| XGT | Anthem BCBS of Connecticut |
| XGV | Anthem BCBS of Connecticut |
| XGY | Anthem BCBS of Connecticut |
| XGZ | Anthem BCBS of Connecticut |
| XHR | Anthem BCBS of Connecticut |
| XRY | Anthem BCBS of Connecticut |
| XTM | Anthem BCBS of Connecticut |
| XVV | Anthem BCBS of Connecticut |
| XWJ | Anthem BCBS of Connecticut |
| XWN | Anthem BCBS of Connecticut |
| XYN | Anthem BCBS of Connecticut |
| XYZ | Anthem BCBS of Connecticut |
| XFQ | Anthem BCBS of New Hampshire |
| XGU | Anthem BCBS of New Hampshire |
| XHV | Anthem BCBS of New Hampshire |
| XNS | Anthem BCBS of New Hampshire |
| XVQ | Horizon BCBS of New Jersey |
| XLS | BCBS of Western New York |
| XNG | BCBS of Western New York |
| XNQ | BCBS of Western New York |
| XDG | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| XHQ | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| XPP | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| XLA | BCBS of Hawaii |
| XLB | BCBS of Hawaii |
| XLC | BCBS of Hawaii |
| XLD | BCBS of Hawaii |
| XLE | BCBS of Hawaii |
| XLF | BCBS of Hawaii |
| XLG | BCBS of Hawaii |
| XLH | BCBS of Hawaii |
| XLI | BCBS of Hawaii |
| XLK | BCBS of Hawaii |
| XLL | BCBS of Hawaii |
| XLM | BCBS of Hawaii |
| XLN | BCBS of Hawaii |
| XLP | BCBS of Hawaii |
| XLQ | BCBS of Hawaii |
| XLR | BCBS of Hawaii |
| XLT | BCBS of Hawaii |
| XLW | BCBS of Hawaii |
| XLX | BCBS of Hawaii |
| XLY | BCBS of Hawaii |
| XLZ | BCBS of Hawaii |