NumberResearchRecent prefix assignments
358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026
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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May 2026
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Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-07-05 | 548-965 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-07-05 | 548-966 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-07-05 | 548-967 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-07-05 | 548-968 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-07-05 | 548-969 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-07-05 | 548-970 | not yet reported which blocks → | Iristel Inc. | 154E | Windsor | — |
| 2022-07-05 | 725-712 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NV | 029F | LAS VEGAS | NV |
| 2022-07-05 | 828-878 | 0XXX7XXX8XXX9XXX · 4 holders which blocks → | AT&T - LOCAL | 7421 | CLAREMONT | NC |
| 2022-07-05 | 864-798 | 7XXX8XXX9XXX · 2 holders which blocks → | AT&T - LOCAL | 7421 | CLINTON | SC |
| 2022-07-05 | 929-625 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | NWYRCYZN07 | NY |
| 2022-07-05 | 945-262 | 0–9 XXXall 10 · 3 holders which blocks → | TRUSTID, INC. | 896J | DALLAS | TX |
| 2022-07-04 | 249-459 | not yet reported which blocks → | Fibernetics Corporation | 464D | Bruce Mines | — |
| 2022-07-04 | 249-461 | not yet reported which blocks → | Fibernetics Corporation | 464D | Chub Lake | — |
| 2022-07-04 | 249-462 | not yet reported which blocks → | Fibernetics Corporation | 464D | Desbarats | — |
| 2022-07-04 | 249-463 | not yet reported which blocks → | Fibernetics Corporation | 464D | Echo Bay | — |
| 2022-07-04 | 249-464 | not yet reported which blocks → | Fibernetics Corporation | 464D | Elliot Lake | — |
| 2022-07-04 | 249-465 | not yet reported which blocks → | Fibernetics Corporation | 464D | Goulais | — |
| 2022-07-04 | 249-466 | not yet reported which blocks → | Fibernetics Corporation | 464D | Iron Bridge | — |
| 2022-07-04 | 249-467 | not yet reported which blocks → | Fibernetics Corporation | 464D | Ophir | — |
| 2022-07-04 | 249-469 | not yet reported which blocks → | Fibernetics Corporation | 464D | Searchmont | — |
| 2022-07-04 | 249-470 | not yet reported which blocks → | Fibernetics Corporation | 464D | St. Joseph Island | — |
| 2022-07-04 | 249-471 | not yet reported which blocks → | Fibernetics Corporation | 464D | Thessalon | — |
| 2022-07-01 | 346-568 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | LANGHAMCRK | TX |
| 2022-07-01 | 346-569 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | SATSUMA | TX |
| 2022-07-01 | 346-572 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | TOMBALL | TX |
| 2022-07-01 | 423-350 | 0–9 XXXall 10 · 2 holders which blocks → | COMMIO, LLC | 939H | BRISTOL | TN |
| 2022-07-01 | 423-860 | 0–9 XXXall 10 · 2 holders which blocks → | COMMIO, LLC | 939H | CHATTNOOGA | TN |
| 2022-07-01 | 509-652 | 0XXX2XXX3XXX4XXX5XXX7XXX · 2 holders which blocks → | ONVOY, LLC - WA | 483E | SPRINGDALE | WA |
| 2022-07-01 | 612-487 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | TWINCITIES | MN |
| 2022-07-01 | 650-640 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNCRL-BLMT | CA |
| 2022-07-01 | 651-392 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | TWINCITIES | MN |
| 2022-07-01 | 669-317 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SNJS NORTH | CA |
| 2022-07-01 | 945-260 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | FRISCO | TX |
| 2022-07-01 | 945-261 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | GRANDPRARI | TX |
| 2022-07-01 | 971-431 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | GRESHAM | OR |
| 2022-07-01 | 971-433 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OR | 076F | SALEM | OR |
| 2022-06-30 | 240-932 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - MD | 071F | WSNG236Z14 | MD |
| 2022-06-30 | 249-456 | not yet reported which blocks → | Fibernetics Corporation | 464D | Algoma Mills | — |
| 2022-06-30 | 249-457 | not yet reported which blocks → | Fibernetics Corporation | 464D | Batchawana Bay | — |
| 2022-06-30 | 249-458 | not yet reported which blocks → | Fibernetics Corporation | 464D | Blind River | — |
| 2022-06-30 | 343-506 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lancaster | — |
| 2022-06-30 | 423-275 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | CHATTNOOGA | TN |
| 2022-06-30 | 424-472 | 0–9 XXXall 10 · 6 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | BEVERLYHLS | CA |
| 2022-06-30 | 431-318 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Edwin | — |
| 2022-06-30 | 431-319 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Portage La Prairie | — |
| 2022-06-30 | 559-806 | 0–9 XXXall 10 · 5 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | VISALIA | CA |
| 2022-06-30 | 559-828 | 0XXX2XXX6XXX7XXX · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SELMA | CA |
| 2022-06-30 | 581-689 | not yet reported which blocks → | Fibernetics Corporation | 464D | Quebec | — |
| 2022-06-30 | 629-279 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | GOODLETSVL | TN |
| 2022-06-30 | 639-852 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Davidson | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.