NumberResearchRecent prefix assignments
360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
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.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2012-05-07 | 917-962 | 0–9 XXXall 10 · 5 holders which blocks → | CSC VOICE, LLC | 612K | NWYRCYZN03 | NY |
| 2012-05-05 | 234-209 | 0–9 XXXall 10 · 2 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | NO CANTON | OH |
| 2012-05-04 | 226-494 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chatham | — |
| 2012-05-04 | 510-340 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HAYWARD | CA |
| 2012-05-04 | 705-470 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Sudbury | — |
| 2012-05-04 | 807-456 | not yet reported which blocks → | TELUS Mobility | 8303 | Kenora | — |
| 2012-05-04 | 867-688 | not yet reported which blocks → | TELUS Mobility | 8303 | Yellowknife | — |
| 2012-05-04 | 867-689 | not yet reported which blocks → | TELUS Mobility | 8303 | Whitehorse | — |
| 2012-05-03 | 509-424 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | YAKIMA | WA |
| 2012-05-03 | 623-299 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2012-05-03 | 763-217 | 0–9 XXXwhole prefix which blocks → | WIRELESS COMMUNICATIONS VENTURE | 4609 | BIG LAKE | MN |
| 2012-05-02 | 204-520 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Brandon | — |
| 2012-05-02 | 204-521 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Portage La Prairie | — |
| 2012-05-02 | 218-215 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - MN | 5256 | NASHWAUK | MN |
| 2012-05-02 | 224-308 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | ROUND LAKE | IL |
| 2012-05-02 | 226-272 | not yet reported which blocks → | Iristel Inc. | 154E | London | — |
| 2012-05-02 | 289-307 | not yet reported which blocks → | Iristel Inc. | 154E | Markham | — |
| 2012-05-02 | 289-512 | not yet reported which blocks → | Iristel Inc. | 154E | Oshawa | — |
| 2012-05-02 | 289-817 | not yet reported which blocks → | Iristel Inc. | 154E | Oakville | — |
| 2012-05-02 | 438-792 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-793 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-794 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-795 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 438-796 | not yet reported which blocks → | Iristel Inc. | 154E | Montreal | — |
| 2012-05-02 | 579-999 | not yet reported which blocks → | Iristel Inc. | 154E | Longueuil | — |
| 2012-05-02 | 740-618 | 0–9 XXXall 10 · 9 holders which blocks → | HORIZON SERVICES, INC. - OH | 601G | NEWARK | OH |
| 2012-05-02 | 819-510 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2012-05-02 | 902-201 | not yet reported which blocks → | Iristel Inc. | 154E | Charlottetown | — |
| 2012-05-02 | 989-439 | 0–9 XXXall 10 · 5 holders which blocks → | CLEAR RATE COMMUNICATIONS, LLC | 046L | BAY CITY | MI |
| 2012-05-01 | 312-600 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC | 224C | CHICGOZN01 | IL |
| 2012-05-01 | 402-249 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NE | 995E | STROMSBURG | NE |
| 2012-05-01 | 469-314 | 0–9 XXXall 10 · 8 holders which blocks → | PAETEC ITEL, LLC | 829J | ROCKWALL | TX |
| 2012-05-01 | 941-777 | 0–9 XXXall 10 · 4 holders which blocks → | TERRA NOVA TELECOM, INC. - FL | 382G | MYAKKA | FL |
| 2012-04-30 | 209-272 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | MODESTO | CA |
| 2012-04-28 | 234-208 | 0–9 XXXall 10 · 4 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | AKRON | OH |
| 2012-04-28 | 714-853 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | FULLERTON | CA |
| 2012-04-27 | 204-498 | not yet reported which blocks → | LES.NET (1996) Inc. | 141F | Selkirk | — |
| 2012-04-27 | 204-846 | not yet reported which blocks → | LES.NET (1996) Inc. | 141F | Steinbach | — |
| 2012-04-27 | 224-251 | 0–9 XXXall 10 · 4 holders which blocks → | ILLINOIS BELL TEL CO | 9329 | SKOKIE | IL |
| 2012-04-27 | 267-272 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF PENNSYLVANIA, LLC - PA | 967E | QUAKERTOWN | PA |
| 2012-04-27 | 289-768 | not yet reported which blocks → | Iristel Inc. | 154E | Hamilton | — |
| 2012-04-27 | 289-769 | not yet reported which blocks → | Iristel Inc. | 154E | Hamilton | — |
| 2012-04-27 | 289-901 | not yet reported which blocks → | Iristel Inc. | 154E | Brampton | — |
| 2012-04-27 | 289-902 | not yet reported which blocks → | Iristel Inc. | 154E | Ancaster | — |
| 2012-04-27 | 289-906 | not yet reported which blocks → | Iristel Inc. | 154E | Bolton | — |
| 2012-04-27 | 470-325 | 0–9 XXXwhole prefix which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | ATLANTA NE | GA |
| 2012-04-27 | 770-299 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - GA | 8392 | ATLANTA NE | GA |
| 2012-04-27 | 832-649 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | HOUSTON | TX |
| 2012-04-27 | 860-603 | 0–9 XXXall 10 · 8 holders which blocks → | COMCAST IP PHONE, LLC | 318J | COLCHESTER | CT |
| 2012-04-27 | 912-777 | 0–9 XXXall 10 · 4 holders which blocks → | SOUTH CAROLINA NET, INC. DBA SPIRIT TELECOM - GA | 898E | SAVANNAH | GA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.