| BAH BAI BAO BBB BBD BBF BBN BBR BBX BCU BDE BDK BDQ BDV BDX BDY BED BEQ BEV BEX BFA BFT BGQ BGU BGV BHA BHC BHD BHJ BHY BHZ BID BIF BIH BIQ BIV BIZ BJC BJE BJF BJJ BJR BJT BJU BJX BKE BKF BKU BLF BLG BLI BLV BMD BMR BMU BMZ BNB BNE BNI BNJ BNO BNR BOI BON BOO BPT BPU BQA BQD BQF BQG BQJ BQK BQM BQN BQR BQS BQU BQV BQY BRI BSB BSF BSK BSQ BSS BST BTC BTJ BTL BTQ BTR BTV BUA BUC BUG BUP BUQ BUT BUV BUY BVC BVJ BVK BVL BVS BVU BVV BVW BVX BVY BWJ BWP BWQ BWS BWV BXD BXJ BXK BXM BXS BXW BXX BXY BYD BYE BYH BYL BYT BYX BYY BZA BZC BZD BZE BZF BZL BZN BZQ BZW | Alpha Prefix not assigned or unallocated |
| BKJ BXC | Anthem Blue Cross Blue Shield of Colorado |
| BAB BBH BHR BYN | Anthem Blue Cross Blue Shield of Connecticut |
| BHQ BIC BIW BIY BLO BPV BQH BSP BTY | Anthem Blue Cross Blue Shield of Georgia |
| BCJ BCK BDJ BDT BFX BLB BLJ BLK BNA BPL BRL BRT BYB BYK BYP BYZ | Anthem Blue Cross Blue Shield of Indiana |
| BFD BPM BZY | Anthem Blue Cross Blue Shield of Kentucky |
| BAV BDD BEY BFZ BHI BJZ BXN BYU | Anthem Blue Cross Blue Shield of Maine |
| BAK BIR BKM BKO BMJ BNX BOY BQP BUE BXA | Anthem Blue Cross Blue Shield of Missouri |
| BMX BNQ BYM | Anthem Blue Cross Blue Shield of Nevada |
| BJD BKA BPP BQE BTO BYV | Anthem Blue Cross Blue Shield of New Hampshire |
| BAA BAU BCN BDO BDP BEH BEN BES BFC BFK BHK BIA BIG BJA BJL BLN BLP BLZ BMN BNV BOD BPO BQL BTE BTK BUK BUR BWE BWY BXR BYC BZM | Anthem Blue Cross Blue Shield of Ohio |
| BFJ BGE BJK BLY BSG BTX BUI BUM BVA BVN BWG BWI BWR BWT | Anthem Blue Cross Blue Shield of Virginia |
| BBV BEL BGG BGZ BJM BJY BLL BLQ BMA BMH BML BSX BTP | Anthem Blue Cross Blue Shield of Wisconsin |
| BAY BBK BBL BBW BCL BCP BGM BKI BNG BNY BRX BTW BWZ BYJ | Anthem Bluecross of California |
| BCA BCH BCQ BDB BDR BTU | Arkansas Blue Cross Blue Shield |
| BAG BBQ BBS BDM BEG BGI BGL BKS BLU BRO | Blue Cross Blue Shield of Alabama |
| BAM BAP BBE BBU BBZ BCB BCS BCX BDG BDL BEM BGR BHP BJG BJQ BKC BLR BLW BLX BMB BMO BMT BNF BNK BNT BNU BPA BPD BPG BRG BRU BRW BTA BVG BWL BXE BXQ BYR | Blue Cross Blue Shield of Illinois |
| BAD BAQ BBT BDF BGN BMQ BVM | Blue Cross Blue Shield of Kansas City |
| BFB BPQ BPS BVI | Blue Cross Blue Shield of Louisiana |
| BBP BCI BER BGA BGD BHF BHT BIT BIU BKL BKW BKX BKZ BNC BND BOS BPH BPN BQT BSA BSC BSM BSN BUO BVH BXG BXU | Blue Cross Blue Shield of Massachusetts |
| BBI BBY BDA BDC BDS BEC BEE BEF BEI BFO BGB BGC BGP BHM BIE BIM BIS BOC BOF BOG BOP BPJ BPK BPW BQW BRE BRM BRP BRV BSI BUB BUD BUF BUX BWD BWN BXV BZH BZU BZX | Blue Cross Blue Shield of Michigan |
| BHH BHV BJP BOZ BPC BPY BRF BUZ BVZ BXT | Blue Cross Blue Shield of Minnesota |
| BHX BXB | Blue Cross Blue Shield of Montana |
| BHL BJO BLD | Blue Cross Blue Shield of Nebraska |
| BNM | Blue Cross Blue Shield of New Mexico |
| BFP BII BJS BMC BQO BTB BUU BVR BZJ BZP BZZ | Blue Cross Blue Shield of North Carolina |
| BAL | Blue Cross Blue Shield of North Dakota |
| BAF BOK BRQ | Blue Cross Blue Shield of Oklahoma |
| BOU BRJ | Blue Cross Blue Shield of Rhode Island |
| BAT BEB BGH BGT BHU BIL BIX BKQ BLT BOA BSH BSZ BUL BUN BWF BWO BXZ BZO BZS | Blue Cross Blue Shield of South Carolina |
| BDU BFE BFF BHN BVP | Blue Cross Blue Shield of Tennessee |
| BAS BAZ BBG BCG BEJ BFG BFQ BFS BGX BHE BKK BMG BMY BNN BOW BRH BRK BSE BSL BWC | Blue Cross Blue Shield of Texas |
| BVT BWA | Blue Cross Blue Shield of Vermont |
| BFI BFW BLC BQQ BUJ BXF BXH BXP | Blue Cross Blue Shield of Western New York |
| BHS BKY BLH BTN BVO BXL BYO | Bluecross of Idaho |
| BCV BGJ BKN BKP BNW BOE BOH BOJ BOX BQI BQX BRA BRC BRY BSY BVD BZT | Blueshield of California |
| BGY BHB BHW BYS | Capital Bluecross of Pennsylvania |
| BAC BAN BAR BBO BCD BCE BDN BDZ BEK BEP BFH BFU BFY BGF BGK BIJ BIN BIO BJW BKV BME BMI BNH BNL BNS BOQ BOT BPF BPZ BQZ BRB BRN BSO BSV BTH BWB BXI BXO BYF BYG BYI BZV | Carefirst Blue Cross Blue Shield(Maryland/District of Columbia/Northern Virginia) |
| BAE BAW BCW BGW BKT BLS BMF BPR BTD | Empire Blue Cross Blue Shield of New York |
| BBA BCY BEA BEU BFL BFR BGO BJI BJV BLA BLE BLM BMV BOB BSU | Florida Blue |
| BBM BCM BET BFM BJN BOV BUH BJI BJV BLA BLE BLM BMV BOB BSU | Highmark Blue Cross Blue Shield of Pennsylvania |
| BAX BDW BEO BEW BFV BJB BNZ BYA | Horizon Blue Cross Blue Shield of New Jersey |
| BMW BRD BSJ BWW | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| BBC BBJ BCC BGS BKD BKH BOR BRD BSR BTG BVE BZB BZK | Premera Blue Cross Blue Shield of Alaska |
| BCT BCZ BIK BIP BMP BPX BQB BRR BTI BWX BYQ BYW | Regence Blue Cross Blue Shield(Oregon/Idaho/Utah/Washington) |
| BAJ BCF BCO BCR BDH BDI BEZ BFN BHG BHO BIB BJH BKB BKG BKR BMK BMM BMS BNP BOL BOM BPB BPE BPI BQC BRS BRZ BSD BSW BTF BTM BTS BTT BTZ BUS BUW BVB BVF BVQ BWH BWK BWM BWU BZG BZI BZR | Wellmark Blue Cross Blue Shield of South Dakota/Iowa |