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 |
|---|---|---|---|---|---|---|
| 2018-03-22 | 579-318 | not yet reported which blocks → | Distributel | 083E | Vercheres | — |
| 2018-03-22 | 650-880 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | MT VIEW | CA |
| 2018-03-22 | 707-699 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST PHONE OF CALIFORNIA, LLC | 394L | NAPA | CA |
| 2018-03-22 | 720-827 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2018-03-22 | 737-471 | 0–9 XXXall 10 · 2 holders which blocks → | SOUTHWESTERN BELL | 9533 | AUSTIN | TX |
| 2018-03-22 | 765-217 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | YORKTOWN | IN |
| 2018-03-22 | 805-519 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | ARROYOGRND | CA |
| 2018-03-22 | 843-829 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - SC | 077F | NEWTONVL | SC |
| 2018-03-22 | 843-894 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - SC | 077F | PAWLEYS IS | SC |
| 2018-03-22 | 940-253 | 0–9 XXXall 10 · 6 holders which blocks → | COMCELL, INC. - TX | 162J | BOWIE | TX |
| 2018-03-22 | 951-822 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS NETWORKS, LLC | 899D | PERRIS | CA |
| 2018-03-21 | 214-897 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LEWISVILLE | TX |
| 2018-03-21 | 346-325 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SATSUMA | TX |
| 2018-03-21 | 365-210 | not yet reported which blocks → | Distributel | 082E | Ancaster | — |
| 2018-03-21 | 365-212 | not yet reported which blocks → | Distributel | 082E | Binbrook | — |
| 2018-03-21 | 365-214 | not yet reported which blocks → | Distributel | 082E | Dundas | — |
| 2018-03-21 | 365-215 | not yet reported which blocks → | Distributel | 082E | Hagersville | — |
| 2018-03-21 | 365-216 | not yet reported which blocks → | Distributel | 082E | Mount Hope | — |
| 2018-03-21 | 365-218 | not yet reported which blocks → | Distributel | 082E | Stoney Creek | — |
| 2018-03-21 | 365-219 | not yet reported which blocks → | Distributel | 082E | West Lincoln | — |
| 2018-03-21 | 365-221 | not yet reported which blocks → | Distributel | 082E | Winona | — |
| 2018-03-21 | 440-589 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHAGRINFLS | OH |
| 2018-03-21 | 469-439 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDPRARI | TX |
| 2018-03-21 | 479-332 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | FAYETTEVL | AR |
| 2018-03-21 | 479-334 | 0–9 XXXall 10 · 7 holders which blocks → | T-MOBILE USA, INC. | 6529 | SPRINGDALE | AR |
| 2018-03-21 | 501-273 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | CONWAY | AR |
| 2018-03-21 | 629-218 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TN | 124F | MURFREESBO | TN |
| 2018-03-21 | 786-588 | 0–9 XXXwhole prefix which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | KEYS | FL |
| 2018-03-21 | 956-359 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MCALLEN | TX |
| 2018-03-20 | 208-913 | 0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | COMCAST IP PHONE, LLC | 318J | KETCHUM | ID |
| 2018-03-20 | 226-405 | not yet reported which blocks → | Distributel | 082E | Bothwell | — |
| 2018-03-20 | 226-410 | not yet reported which blocks → | Distributel | 082E | Thamesville | — |
| 2018-03-20 | 226-412 | not yet reported which blocks → | Distributel | 082E | Merlin | — |
| 2018-03-20 | 226-413 | not yet reported which blocks → | Distributel | 082E | Dresden | — |
| 2018-03-20 | 226-414 | not yet reported which blocks → | Distributel | 082E | Tilbury | — |
| 2018-03-20 | 226-415 | not yet reported which blocks → | Distributel | 082E | Highgate | — |
| 2018-03-20 | 226-416 | not yet reported which blocks → | Distributel | 082E | Blenheim | — |
| 2018-03-20 | 226-418 | not yet reported which blocks → | Distributel | 082E | Ridgetown | — |
| 2018-03-20 | 226-419 | not yet reported which blocks → | Distributel | 082E | Wallaceburg | — |
| 2018-03-20 | 423-541 | 0–9 XXXall 10 · 2 holders which blocks → | VONAGE AMERICA LLC | 197D | CHATTNOOGA | TN |
| 2018-03-20 | 430-242 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | GREENVILLE | TX |
| 2018-03-20 | 469-456 | 0–9 XXXall 10 · 2 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | ENNIS | TX |
| 2018-03-20 | 470-450 | 0–9 XXXall 10 · 3 holders which blocks → | VONAGE AMERICA LLC | 197D | ATLANTA NE | GA |
| 2018-03-20 | 470-829 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA | GA |
| 2018-03-20 | 513-514 | 0–9 XXXall 10 · 6 holders which blocks → | WIDE VOICE, LLC - OH | 765H | CINCINNATI | OH |
| 2018-03-20 | 562-702 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS NETWORKS, LLC | 899D | ALAMITOS | CA |
| 2018-03-20 | 581-559 | not yet reported which blocks → | Distributel | 083E | Ferland | — |
| 2018-03-20 | 581-564 | not yet reported which blocks → | Distributel | 083E | Jonquiere | — |
| 2018-03-20 | 581-565 | not yet reported which blocks → | Distributel | 083E | La Baie (Chicoutimi Co.) | — |
| 2018-03-20 | 581-566 | not yet reported which blocks → | Distributel | 083E | Laterriere | — |
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.