NumberResearchRecent prefix assignments
341 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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-03-29 | 431-549 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hazelridge | — |
| 2022-03-29 | 431-550 | not yet reported which blocks → | Fibernetics Corporation | 464D | Holland | — |
| 2022-03-29 | 431-551 | not yet reported which blocks → | Fibernetics Corporation | 464D | Langruth | — |
| 2022-03-29 | 431-783 | not yet reported which blocks → | Fibernetics Corporation | 464D | Miami | — |
| 2022-03-29 | 431-784 | not yet reported which blocks → | Fibernetics Corporation | 464D | Notre Dame de Lourdes | — |
| 2022-03-29 | 431-785 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oakville | — |
| 2022-03-29 | 431-786 | not yet reported which blocks → | Fibernetics Corporation | 464D | Poplar Point | — |
| 2022-03-29 | 539-283 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | TULSA | OK |
| 2022-03-29 | 672-823 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lillooet | — |
| 2022-03-29 | 672-824 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Little Fort | — |
| 2022-03-29 | 725-273 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NV | 6458 | LAUGHLIN | NV |
| 2022-03-29 | 754-288 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | FTLAUDERDL | FL |
| 2022-03-29 | 771-222 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC | 6402 | WSHNGTNZN1 | DC |
| 2022-03-29 | 904-835 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | JACKSONVL | FL |
| 2022-03-29 | 971-825 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | CLACKAMAS | OR |
| 2022-03-28 | 216-489 | 0–9 XXXall 10 · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | CLEVELAND | OH |
| 2022-03-28 | 223-281 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - PA | 002F | COLUMBIA | PA |
| 2022-03-28 | 251-386 | 0–9 XXXall 10 · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | MOBILE | AL |
| 2022-03-28 | 318-821 | 0–9 XXXall 10 · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | MONROE | LA |
| 2022-03-28 | 343-223 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Chalk River | — |
| 2022-03-28 | 365-875 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Castleton | — |
| 2022-03-28 | 412-792 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | PTTSBGZON7 | PA |
| 2022-03-28 | 412-797 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | PTGSBNZN12 | PA |
| 2022-03-28 | 412-887 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | PTGSBNZN10 | PA |
| 2022-03-28 | 417-716 | 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | OZARK | MO |
| 2022-03-28 | 505-517 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM | 6573 | AZTEC | NM |
| 2022-03-28 | 520-643 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ | 6572 | WILLCOX | AZ |
| 2022-03-28 | 539-295 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OK | 119F | TAHLEQUAH | OK |
| 2022-03-28 | 548-837 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Hillsburgh | — |
| 2022-03-28 | 579-367 | not yet reported which blocks → | TELUS Quebec | 2243 | St-Hippolyte | — |
| 2022-03-28 | 579-376 | not yet reported which blocks → | TELUS Quebec | 2243 | Hemmingford | — |
| 2022-03-28 | 601-461 | 0–9 XXXall 10 · 3 holders which blocks → | POWERTEL MEMPHIS LICENSES, INC. | 7474 | VICKSBURG | MS |
| 2022-03-28 | 657-580 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ANAHEIM | CA |
| 2022-03-28 | 659-253 | 0–9 XXXall 10 · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | BIRMINGHAM | AL |
| 2022-03-28 | 672-535 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cache Creek | — |
| 2022-03-28 | 672-536 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Clearwater | — |
| 2022-03-28 | 672-559 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Dallas | — |
| 2022-03-28 | 672-560 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Douglas Lake | — |
| 2022-03-28 | 681-438 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LOGAN | WV |
| 2022-03-28 | 743-246 | 0XXX1XXX4XXX5XXX · 3 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | PROSPECTHL | NC |
| 2022-03-28 | 762-677 | 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | TUNNELHILL | GA |
| 2022-03-28 | 769-990 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | JACKSON | MS |
| 2022-03-28 | 779-809 | 0XXX1XXX2XXX8XXX9XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | FULTON | IL |
| 2022-03-28 | 785-613 | 0XXX1XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | TOPEKA | KS |
| 2022-03-28 | 804-679 | 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | OLD CHURCH | VA |
| 2022-03-28 | 986-229 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | BOISE | ID |
| 2022-03-25 | 216-628 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CLEVELAND | OH |
| 2022-03-25 | 253-364 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SUMNER | WA |
| 2022-03-25 | 319-776 | 3XXX6XXX7XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | ROWLEY | IA |
| 2022-03-25 | 319-992 | 0XXX1XXX2XXX9XXX · 3 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | TIFFIN | IA |
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.