Recent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-03-16 | 510-607 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | OKLD MN-PD | CA |
| 2018-03-16 | 510-920 | 0–9 XXXall 10 · 4 holders which blocks → | SONIC TELECOM, LLC - CA | 433E | OKLD MN-PD | CA |
| 2018-03-16 | 540-566 | 0–9 XXXall 10 · 7 holders which blocks → | VONAGE AMERICA LLC | 197D | ROANOKE | VA |
| 2018-03-16 | 540-791 | 0XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → | VONAGE AMERICA LLC | 197D | CULPEPER | VA |
| 2018-03-16 | 602-975 | 0–9 XXXall 10 · 5 holders which blocks → | VONAGE AMERICA LLC | 197D | PHOENIX | AZ |
| 2018-03-16 | 706-203 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | DAWSONVL | GA |
| 2018-03-16 | 712-699 | 0XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | WALL LAKE | IA |
| 2018-03-16 | 914-685 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7650 | YORKTN HTS | NY |
| 2018-03-16 | 986-200 | 0–9 XXXall 10 · 3 holders which blocks → | VONAGE AMERICA LLC | 197D | BOISE | ID |
| 2018-03-15 | 209-458 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7128 | MODESTO | CA |
| 2018-03-15 | 256-629 | 0–9 XXXall 10 · 5 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | FLORENCE | AL |
| 2018-03-15 | 270-203 | 0–9 XXXall 10 · 3 holders which blocks → | WINDSTREAM KENTUCKY EAST, INC. - LONDON | 9691 | UNIONTOWN | KY |
| 2018-03-15 | 325-999 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - TX | 903C | ABILENE | TX |
| 2018-03-15 | 343-715 | not yet reported which blocks → | Nexicom Telecommunications Inc | 995D | Cardiff | — |
| 2018-03-15 | 343-716 | not yet reported which blocks → | Nexicom Telecommunications Inc | 995D | Coe Hill | — |
| 2018-03-15 | 343-717 | not yet reported which blocks → | Nexicom Telecommunications Inc | 995D | Denbigh | — |
| 2018-03-15 | 343-718 | not yet reported which blocks → | Nexicom Telecommunications Inc | 995D | Frankford | — |
| 2018-03-15 | 343-719 | not yet reported which blocks → | Nexicom Telecommunications Inc | 995D | Gilmour | — |
| 2018-03-15 | 343-720 | not yet reported which blocks → | Nexicom Telecommunications Inc | 995D | Bancroft | — |
| 2018-03-15 | 417-912 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO | 5814 | BOLIVAR | MO |
| 2018-03-15 | 431-373 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2018-03-15 | 609-905 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | VONAGE AMERICA LLC | 197D | OCEAN CITY | NJ |
| 2018-03-15 | 747-277 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | NO HOLLYWD | CA |
| 2018-03-15 | 747-389 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS NETWORKS, LLC | 899D | NO HOLLYWD | CA |
| 2018-03-15 | 781-531 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | NEEDHAM | MA |
| 2018-03-15 | 873-240 | not yet reported which blocks → | Videotron Ltd. | 8306 | Trois-Rivieres | — |
| 2018-03-15 | 873-241 | not yet reported which blocks → | Videotron Ltd. | 8306 | Arthabaska | — |
| 2018-03-15 | 873-242 | not yet reported which blocks → | Videotron Ltd. | 8306 | Victoriaville | — |
| 2018-03-15 | 909-955 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS NETWORKS, LLC | 899D | RIALTO | CA |
| 2018-03-15 | 939-588 | 0–9 XXXwhole prefix which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2018-03-15 | 939-625 | 0–9 XXXwhole prefix which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | BAYAMONNOR | PR |
| 2018-03-14 | 213-677 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | LSAN DA 07 | CA |
| 2018-03-14 | 479-329 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | ALMA | AR |
| 2018-03-14 | 515-823 | 0–9 XXXall 10 · 2 holders which blocks → | VONAGE AMERICA LLC | 197D | DES MOINES | IA |
| 2018-03-14 | 530-829 | 0XXX1XXX4XXX8XXX9XXX · 5 holders which blocks → | VONAGE AMERICA LLC | 197D | CHICO | CA |
| 2018-03-14 | 575-733 | 0XXX1XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NM | 123F | RATON | NM |
| 2018-03-14 | 661-741 | 0–9 XXXall 10 · 2 holders which blocks → | VONAGE AMERICA LLC | 197D | BKFD MAIN | CA |
| 2018-03-14 | 838-288 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | SHARON SPG | NY |
| 2018-03-14 | 854-854 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - SC | 548E | MYRTLE BCH | SC |
| 2018-03-14 | 873-224 | not yet reported which blocks → | TELUS Quebec | 2243 | Labelle | — |
| 2018-03-14 | 873-225 | not yet reported which blocks → | TELUS Quebec | 2243 | L'Annonciation | — |
| 2018-03-14 | 873-226 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Adolphe-D'Howard | — |
| 2018-03-14 | 873-227 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Donat-de-Montcalm | — |
| 2018-03-14 | 873-228 | not yet reported which blocks → | TELUS Quebec | 2243 | Ste-Agathe | — |
| 2018-03-14 | 873-229 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Faustin | — |
| 2018-03-14 | 873-230 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Jovite | — |
| 2018-03-14 | 873-231 | not yet reported which blocks → | TELUS Quebec | 2243 | Val David | — |
| 2018-03-14 | 915-264 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | EL PASO | TX |
| 2018-03-13 | 225-416 | 0–9 XXXall 10 · 4 holders which blocks → | VONAGE AMERICA LLC | 197D | BATONROUGE | LA |
| 2018-03-13 | 251-283 | 0–9 XXXall 10 · 5 holders which blocks → | VONAGE AMERICA LLC | 197D | MOBILE | AL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.