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 |
|---|---|---|---|---|---|---|
| 2018-06-12 | 667-242 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | ROCK HALL | MD |
| 2018-06-12 | 667-244 | 0–9 XXXall 10 · 3 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | STILL POND | MD |
| 2018-06-12 | 667-245 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | CECILTON | MD |
| 2018-06-12 | 667-246 | 0–9 XXXwhole prefix which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | CENTREVL | MD |
| 2018-06-12 | 667-247 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | CHESAPKECY | MD |
| 2018-06-12 | 667-248 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | DENTON | MD |
| 2018-06-12 | 667-249 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | GALENA | MD |
| 2018-06-12 | 681-322 | 0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → | VONAGE AMERICA LLC | 197D | CHRLSTNZN4 | WV |
| 2018-06-12 | 720-727 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CO | 078F | LONGMONT | CO |
| 2018-06-12 | 845-506 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC- NY | 384C | PORTJERVIS | NY |
| 2018-06-12 | 845-604 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC- NY | 384C | MONROE | NY |
| 2018-06-12 | 951-518 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | MORENO | CA |
| 2018-06-11 | 217-606 | 0–9 XXXall 10 · 6 holders which blocks → | VONAGE AMERICA LLC | 197D | SPRINGFLD | IL |
| 2018-06-11 | 240-596 | 0–9 XXXall 10 · 3 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | ASHTON236 | MD |
| 2018-06-11 | 240-598 | 0–9 XXXall 10 · 3 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | HUGHESVL | MD |
| 2018-06-11 | 240-610 | 0–9 XXXall 10 · 4 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | WSHNGTNZN4 | MD |
| 2018-06-11 | 240-622 | 0–9 XXXall 10 · 4 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | LA PLATA | MD |
| 2018-06-11 | 240-628 | 0–9 XXXall 10 · 5 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | MECHANCSVL | MD |
| 2018-06-11 | 240-634 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | RIDGE | MD |
| 2018-06-11 | 240-635 | 0–9 XXXall 10 · 3 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | TOMPKINSVL | MD |
| 2018-06-11 | 240-637 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | WSHNGTNZN3 | MD |
| 2018-06-11 | 240-647 | 0–9 XXXall 10 · 3 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | CLEAR SPG | MD |
| 2018-06-11 | 240-679 | 0–9 XXXall 10 · 4 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | FRIENDSVL | MD |
| 2018-06-11 | 302-390 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE | 6393 | GEORGETOWN | DE |
| 2018-06-11 | 302-445 | 0–9 XXXall 10 · 3 holders which blocks → | CORETEL DELAWARE, INC. - DE | 1991 | BRIDGEVL | DE |
| 2018-06-11 | 302-446 | 0–9 XXXall 10 · 3 holders which blocks → | CORETEL DELAWARE, INC. - DE | 1991 | CAMDEN | DE |
| 2018-06-11 | 302-447 | 0–9 XXXall 10 · 2 holders which blocks → | CORETEL DELAWARE, INC. - DE | 1991 | GEORGETOWN | DE |
| 2018-06-11 | 302-459 | 0–9 XXXall 10 · 4 holders which blocks → | CORETEL DELAWARE, INC. - DE | 1991 | MILFORD | DE |
| 2018-06-11 | 302-461 | 0–9 XXXwhole prefix which blocks → | CORETEL DELAWARE, INC. - DE | 1991 | NEWARK | DE |
| 2018-06-11 | 302-471 | 0–9 XXXall 10 · 5 holders which blocks → | CORETEL DELAWARE, INC. - DE | 1991 | SMYRNA | DE |
| 2018-06-11 | 431-494 | not yet reported which blocks → | Distributel | 081E | Dugald | — |
| 2018-06-11 | 431-495 | not yet reported which blocks → | Distributel | 081E | Edwin | — |
| 2018-06-11 | 431-496 | not yet reported which blocks → | Distributel | 081E | Elie | — |
| 2018-06-11 | 431-497 | not yet reported which blocks → | Distributel | 081E | Elm Creek | — |
| 2018-06-11 | 431-498 | not yet reported which blocks → | Distributel | 081E | Gladstone | — |
| 2018-06-11 | 431-499 | not yet reported which blocks → | Distributel | 081E | Hazelridge | — |
| 2018-06-11 | 431-501 | not yet reported which blocks → | Distributel | 081E | Holland | — |
| 2018-06-11 | 431-502 | not yet reported which blocks → | Distributel | 081E | Langruth | — |
| 2018-06-11 | 431-503 | not yet reported which blocks → | Distributel | 081E | Macdonald | — |
| 2018-06-11 | 431-504 | not yet reported which blocks → | Distributel | 081E | Macgregor | — |
| 2018-06-11 | 431-505 | not yet reported which blocks → | Distributel | 081E | Miami | — |
| 2018-06-11 | 431-512 | not yet reported which blocks → | Distributel | 081E | Notre Dame de Lourdes | — |
| 2018-06-11 | 431-513 | not yet reported which blocks → | Distributel | 081E | Oakbank | — |
| 2018-06-11 | 431-514 | not yet reported which blocks → | Distributel | 081E | Oakville | — |
| 2018-06-11 | 431-515 | not yet reported which blocks → | Distributel | 081E | Pilot Mound | — |
| 2018-06-11 | 470-402 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | GRIFFIN | GA |
| 2018-06-11 | 571-523 | 0–9 XXXall 10 · 5 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | HERNDON | VA |
| 2018-06-11 | 581-507 | not yet reported which blocks → | Iristel Inc. | 154E | Baie-Comeau (Hauterive) | — |
| 2018-06-11 | 667-236 | 0–9 XXXall 10 · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | PERRYVILLE | MD |
| 2018-06-11 | 667-237 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | CORE COMMUNICATIONS, INC.- MD | 2593 | WEST RIVER | MD |
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.