| FAG FAI FAN FAP FAT FAV FBE FBI FBK FBO FBU FBV FBW FBX FCB FCH FCI FCK FCP FCR FCV FDE FDR FDX FDY FEC FEG FEI FEN FEP FEV FFF FFW FFX FGF FGH FGO FHF FHK FHZ FIB FIF FII FIW FJG FJK FKB FKG FKH FKR FLC FLD FLM FLR FLU FMC FMP FMQ FMY FMZ FNC FNF FNK FNP FNX FOE FOI FOM FOQ FOS FOV FOW FOY FOZ FPB FPG FPI FPN FPP FPT FQB FQD FQG FQM FQS FQX FRK FRL FRM FRT FRY FRZ FSI FSK FSS FSY FSZ FTK FTL FTM FTP FTU FTW FUC FUD FUH FUJ FUR FUU FUX FUZ FVD FVG FVH FVJ FVK FVO FVQ FVR FVY FVZ FWG FWK FWP FWQ FWU FXO FXT FYB FYC FYE FYI FYT FYV FYX FZG FZI FZK FZL FZS | Alpha Prefix not assigned or unallocated |
| FBB FDW FIV FLW FQJ | Anthem Blue Cross Blue Shield of Colorado |
| FST FTI | Anthem Blue Cross Blue Shield of Connecticut |
| FAJ FAK FAW FAY FBF FDK FEA FEL FEY FFE FFJ FFO FGN FHP FIC FJA FJB FJD FJE FJF FJQ FJU FJV FJX FKS FLA FLI FLO FLS FLY FNB FNV FOL FQH FQI FSM FSQ FSU FTF FUQ FXI | Anthem Blue Cross Blue Shield of Georgia |
| FCA FEF FGJ FUI FYK | Anthem Blue Cross Blue Shield of Indiana |
| FNR FTS FXA | Anthem Blue Cross Blue Shield of Kentucky |
| FEJ FFV FGZ FHQ FRW FUL FUY | Anthem Blue Cross Blue Shield of Missouri |
| FCT | Anthem Blue Cross Blue Shield of Nevada |
| FAF FAH FBD FBG FBJ FCY FDU FEM FEZ FFQ FGD FGI FGV FHM FHO FIN FIX FMU FMW FNE FNJ FOR FPA FSE FTB FTN FTQ FUB FWR FWW FXE FYD | Anthem Blue Cross Blue Shield of Ohio |
| FAB FAU FAZ FMN FRD FRE FTJ FTZ FVI FVP FWJ FWZ FXW FYG FYJ FZX | Anthem Blue Cross Blue Shield of Virginia |
| FAA FGB FIA FIY FPY FRH FSB FUE | Anthem Blue Cross Blue Shield of Wisconsin |
| FAL FAR FAS FCG FCX FDS FEW FEX FFS FGM FGW FJZ FKP FLL FLZ FNQ FNS FPD FPF FPZ FRX FTA FUW FVM FXB FXD FXF FXG FXK FXL FXM FXZ FZE | Anthem Bluecross of California |
| FBY FWT | Arkansas Blue Cross Blue Shield |
| FEK FGR FMO FOU FRV | Blue Cross Blue Shield of Alabama |
| FLH FQL FSJ FZR | Blue Cross Blue Shield of Arizona |
| FAD FAX FBR FCC FCD FCS FCU FDC FDG FHA FHL FJC FJN FKA FLK FMB FMT FNG FNZ FOX FPC FQN FRB FSG FSL FSW FTD FTY FUN FVL FVX FWA FWB FWD FWF FWM FWY FXR FZT | Blue Cross Blue Shield of Illinois |
| FBL FBM FCE FDO FEB FGQ FLG FOH FTR | Blue Cross Blue Shield of Kansas City |
| FKF FKU FKY FQA FQT FQW FSX | Blue Cross Blue Shield of Louisiana |
| FFH FGC FHB FHH FHY FJS FMD FMH FNM FQR FRS FSA FTX FXC FYA FYR FYU | Blue Cross Blue Shield of Massachusetts |
| FBP FBZ FCW FDA FDB FET FFA FGP FGS FGU FHC FHI FHN FIE FIJ FIL FIO FIQ FIU FKE FMA FML FMM FMV FND FNU FPM FRO FRQ FSP FVN FVV FYQ FZD FZP | Blue Cross Blue Shield of Michigan |
| FCQ FHX FJP FKT FLB FLE FMG FMX FNL FOG FOP FQF FQP FQZ FWH FWV FXU FYF FYW | Blue Cross Blue Shield of Minnesota |
| FBQ FCL FFB FFN FHD FHE FID FJL FLJ FNT FNY FQE | Blue Cross Blue Shield of Nebraska |
| FAQ FIS FKW FLF FNO FZY | Blue Cross Blue Shield of North Carolina |
| FTC | Blue Cross Blue Shield of Oklahoma |
| FJW | Blue Cross Blue Shield of Rhode Island |
| FAE FBC FBN FBS FER FFD FFK FGA FGE FGX FJJ FKO FLQ FNH FNW FOD FOK FON FPS FQC FQK FRA FRR FRU FSN FUF FUP FUV FZA | Blue Cross Blue Shield of South Carolina |
| FFP FFT FIG FIH FJT FSV FVB FXH FXY FYM FZM | Blue Cross Blue Shield of Tennessee |
| FFM FFZ FGL FLV FMS FNA FRG FRN FUG FVU FXS | Blue Cross Blue Shield of Texas |
| FAC FAO FVT | Blue Cross Blue Shield of Vermont |
| FBA FYH | Blue Cross Blue Shield of Western New York |
| FCJ FHS FIP FME FYY FZB FZF | Bluecross of Idaho |
| FCO FCZ FDI FDZ FMI FOC FOO FPK FPV FQV FRI FTG FTT FVS | Blueshield of California |
| FLN | Blueshield of Northeastern New York |
| FKQ FTO FZQ | Capital Bluecross of Pennsylvania |
| FBT FCF FCN FDP FED FEQ FEU FFY FGK FHT FJH FKC FKI FKJ FKL FKX FKZ FMK FNI FNN FOT FPH FPU FPW FPX FQO FQQ FRF FRP FTE FUA FUK FUS FUT FVA FVE FWE FWI FWL FWO FXN FXV FXX FYL FZH FZN | Carefirst Blue Cross Blue Shield(Maryland/District of Columbia/Northern Virginia) |
| FDD FDM FDT FMJ FSF FZC FZJ | Empire Blue Cross Blue Shield of New York |
| FBH FDJ FDL FEE FFU FGG FHJ FHW FIR FIZ FLT FOB FSO FUO FWN FYN FYZ FZU | Florida Blue |
| FDF FDH FDV FEH FES FFC FFR FGT FHR FJR FKM FKN FPJ FPQ FPR FXP FYO FZO | Highmark Blue Cross Blue Shield of Pennsylvania |
| FEO FLP | Horizon Blue Cross Blue Shield of New Jersey |
| FFI FJM FJO FOJ FQU FSC FSD FVC FWC FYP | Independence Bluecross of Philadelphia and Southeastern Pennsylvania |
| FHU FKK FMR FOA FRJ FSH FSR FZW | Premera Blue Cross Blue Shield of Alaska |
| FIT | Premera Bluecross of Alaska |
| FAM FCM FDN FDQ FFG FFL FGY FHG FHV FIK FIM FJI FJY FKD FKV FLX FMF FOF FPE FPL FPO FQY FRC FTH FTV FUM FVF FVW FWS FWX FXJ FXQ FYS FZV FZZ | Wellmark Blue Cross Blue Shield of South Dakota/Iowa |