| RAF RAW RAY RBB RBD RBJ RBV RBW RCA RCD RCG RCO RCP RCS RCU RCX RDC RDE RDI RDJ RDK RDO RDQ RDV RDW RDY REB REH REL REO RES REZ RFE RFI RFM RFN RFQ RFR RFU RGJ RGQ RGR RHC RHD RHG RHI RIC RIL RIO RIW RJA RJB RJD RJG RJI RJJ RJM RJO RKB RKK RKO RKV RKW RLB RLM RLR RMB RMJ RMT RMU RMY RMZ RNR RNS RNX RNZ ROC ROD ROE ROH ROI ROJ ROL ROM ROQ ROT ROW RPE RPF RPG RPK RPM RPS RPU RQD RQE RQK RQL RQN RQQ RQT RRD RRG RRH RRQ RRR RRU RSA RSC RSF RSJ RSL RSP RTJ RTN RTQ RTR RTV RTX RTY RTZ RUH RUI RUK RUL RUN RUY RUZ RVE RVG RVH RVK RVL RVN RVV RVW RWC RWE RWH RWN RWQ RWW RXH RXL RXM RXP RXQ RXU RXV RXW RXY RYA RYH RYM RYN RYP RYS RYW RYX RYY RYZ RZC RZJ RZQ RZS RZX | Alpha prefix not assigned or unallocated |
| RNF ROZ | Anthem Blue Cross Blue Shield of Colorado |
| RAH RCZ ROG RXG RYE RYV RZT | Anthem Blue Cross Blue Shield of Connecticut |
| RBA RBO RBU RCJ RDA RGP RGU RHB RHT RKY RMP RNG RNJ RPP RQP RRM RSS RTF RTW | Anthem Blue Cross Blue Shield of Georgia |
| RJW RPW RRB RZF | Anthem Blue Cross Blue Shield of Indiana |
| RAR RHF RHR RHS RIU RJC RJP RMD RPB RRL RVX RWZ | Anthem Blue Cross Blue Shield of Kentucky |
| RME | Anthem Blue Cross Blue Shield of Maine |
| RBZ RCI RHE RMK RSE RUC RWJ RWT RWU RWV RZZ | Anthem Blue Cross Blue Shield of Missouri |
| RLL | Anthem Blue Cross Blue Shield of Nevada |
| RAL RBH RBQ RCV RDG RDH RGZ RJE RJN RLC RLH ROR RPH RQJ RRA RRE RRF RXS RYC RYG RYK RYO RZA RZV | Anthem Blue Cross Blue Shield of Ohio |
| RAV RCT RGX RHU RKS RLJ RNN RSM RYL | Anthem Blue Cross Blue Shield of Virginia |
| RAC RBC RDL RFJ RFL RFP RHO RHX RJQ RLV RNH RNK RSI RTB RTD | Anthem Blue Cross Blue Shield of Wisconsin |
| RAT RBL RDX RER REU RFG RFZ RGA RGM RHP RJT RKI RNE RNI RNW RRV RSB RSY RVP RVQ RVS RVY RWP RXO | Anthem Bluecross of California |
| RLF RPY | Arkansas Blue Cross Blue Shield |
| RAJ RCF RCM RGN RGT RIZ ROS RQI RRC RRN RRW RSU RSZ RTU RUE RVF RXI RYU RZP | Blue Cross Blue Shield of Alabama |
| RBG RBT RCR RCY RFH RFK RGB RGL RHY RJV RKH RLD RLK RLN RLZ RML RND RNP ROF RPX RQC RRJ RRS RSN RSR RUV RVC RXE RXK RXX RYD RYF RZB RZE RZK RZU | Blue Cross Blue Shield of Illinois |
| REE RFA RFO RGK RKC RKN RKQ RLS RRK | Blue Cross Blue Shield of Kansas City |
| RCW RNL RPZ | Blue Cross Blue Shield of Louisiana |
| RBR RCH REV RIE RJY RKZ RLG ROA RQM RQW RRO RSG RTO RUR RUS RWL RXZ | Blue Cross Blue Shield of Massachusetts |
| RDS REJ REN RFV RFY RGI RIG RIQ RJZ RLP RMF RMH RMV ROU RPC RQF RQO RQX RQY RTH RXT RYR RZI | Blue Cross Blue Shield of Michigan |
| RBF RBP RBY RFD RFF RKG RKT RNT RSV RTG RVM RWI RWS | Blue Cross Blue Shield of Minnesota |
| RBI | Blue Cross Blue Shield of Mississippi |
| RHK RHZ RLE RNY | Blue Cross Blue Shield of Nebraska |
| RAE RDB RDU RGF RGV ROX RPN RTA RTE | Blue Cross Blue Shield of North Carolina |
| RDD | Blue Cross Blue Shield of North Dakota |
| RJK | Blue Cross Blue Shield of Oklahoma |
| RIA RIB RIN RIS RLT | Blue Cross Blue Shield of Rhode Island |
| RAU RBN RBX RLO RMM RSK RTT RVB | Blue Cross Blue Shield of South Carolina |
| RCL RGG RMG RTM RTP RZM RZN | Blue Cross Blue Shield of Tennessee |
| RAM RBS RCQ REF RET REX REY RGC RGH RHH RHW RRY RUB RUM RWA RXA RXB RXC RXD RXN RZD | Blue Cross Blue Shield of Texas |
| REM RSD | Blue Cross Blue Shield of Vermont |
| RAX RCE REQ RLU RMO ROV RPT RQB RQH RSH RVA RVD RWD RZW RZY | Blue Cross Blue Shield of Western New York |
| RCB RFX RGS RMI RQS | Bluecross of Idaho |
| RAS RAZ RDN RDT REA REI REW RFS RFT RHA RIJ RIV RIX RLY RMX RON ROP RPD RPO RPQ RSO RVO RYT RZO | Blueshield of California |
| RNV ROK | Blueshield of Northeastern New York |
| RLQ RNA RST | Capital Bluecross of Pennsylvania |
| RBM RED RKD RMR RMW RNU RUU RUX RWF RWK | Carefirst Blue Cross Blue Shield(Maryland/District of Columbia/Northern Virginia) |
| RCC RDF REP RFB RKA RLW RPV RVT RVZ RWB RXJ | Empire Blue Cross Blue Shield of New York |
| RMC | Excellus Blue Cross Blue Shield of New York |
| RAB RBK RFC RHJ RIY RJS RNM ROY RTC RTK RTL RYQ | Florida Blue |
| RRX | Florida Explore-My-Plan |
| RDM RDR RDZ RHM RHN RHV RIF RIH RIR RJL RJR RKF RKM RPI RPJ RPL RQG RUQ RWO | Highmark Blue Cross Blue Shield of Pennsylvania |
| RFW RGW RJU RJX RKU RKX RLX RQV RUG RWM RWX RWY RXR RYJ | Horizon Blue Cross Blue Shield of New Jersey |
| RAA RAK RAO RGY RID RIP RIT RLA RLI RMN RNO ROO RRI RSQ RSX RUT RUW RYB RZL RZR | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| RHL RMQ RMS RQZ RUJ RVR RZG | Premera Blue Cross Blue Shield of Alaska |
| RGO RHQ RII RIM RJF RNB ROB RPA RRP RRT RWG RXF RYI | Regence Blue Cross Blue Shield(Oregon/Idaho/Utah/Washington) |
| RAD RAG RAI RAN RAP RAQ RBE RCK RCN RDP REC REG REK RGD RGE RIK RJH RKE RKJ RKL RKP RKR RMA RNC RNQ RPR RQA RQR RQU RRZ RSW RTI RTS RUA RUD RUF RUO RUP RVI RVJ RVU RWR RZH | Wellmark Blue Cross Blue Shield of South Dakota/Iowa |