NumberResearchRecent prefix assignments
375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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
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Jun 2026
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Apr 2026
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Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2018-01-11 | 605-313 | 0–9 XXXwhole prefix which blocks → | NORTHERN VALLEY COMMUNICATIONS, LLC | 6125 | REDFIELD | SD |
| 2018-01-11 | 639-960 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-11 | 639-961 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-11 | 639-962 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-11 | 639-963 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-11 | 720-632 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | 7378 | DENVER | CO |
| 2018-01-11 | 720-992 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CO | 7378 | DENVER | CO |
| 2018-01-11 | 769-759 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - MS | 719E | UTICA | MS |
| 2018-01-11 | 947-205 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | TROY | MI |
| 2018-01-10 | 213-770 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - CA | 649C | LSAN DA 07 | CA |
| 2018-01-10 | 424-489 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | SAN PEDRO | CA |
| 2018-01-10 | 639-860 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-861 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-862 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-863 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-864 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-865 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-866 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-867 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-868 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-10 | 639-869 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2018-01-09 | 205-880 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - AL | 604E | GRAYSVILLE | AL |
| 2018-01-09 | 340-202 | not yet reported which blocks → | LUMEN TECHNOLGIES ST. CROIX, LLC | 128J | ST CROIX | VI |
| 2018-01-09 | 340-249 | not yet reported which blocks → | LUMEN TECHNOLGIES ST. CROIX, LLC | 128J | CHTAMSTTHS | VI |
| 2018-01-09 | 340-489 | not yet reported which blocks → | LUMEN TECHNOLGIES ST. CROIX, LLC | 128J | CHNSTDSTCR | VI |
| 2018-01-09 | 340-625 | not yet reported which blocks → | LUMEN TECHNOLGIES ST. CROIX, LLC | 128J | FRKSTDSTCR | VI |
| 2018-01-09 | 469-380 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PLANO | TX |
| 2018-01-09 | 479-324 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → | VANTAGE TELECOM, LLC DBA NEWROADS TELECOM - AR | 5018 | RUSSELLVL | AR |
| 2018-01-09 | 639-580 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-581 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-582 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-583 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-584 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-585 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-586 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-587 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-588 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-589 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-591 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 639-592 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Regina | — |
| 2018-01-09 | 647-304 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2018-01-09 | 647-619 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2018-01-09 | 952-208 | 0–9 XXXall 10 · 6 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TWINCITIES | MN |
| 2018-01-08 | 209-219 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | ATWATER | CA |
| 2018-01-08 | 217-500 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | EFFINGHAM | IL |
| 2018-01-08 | 470-871 | 0–9 XXXwhole prefix which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | WINDER | GA |
| 2018-01-08 | 617-685 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | CAMBRIDGE | MA |
| 2018-01-08 | 650-398 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SAN MATEO | CA |
| 2018-01-08 | 779-237 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | STREATOR | IL |
| 2018-01-08 | 909-470 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | ARROWHEAD | CA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.