NumberResearchRecent 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.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 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 |
|---|---|---|---|---|---|---|
| 2016-02-12 | 513-975 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - OH | 7532 | CINCINNATI | OH |
| 2016-02-12 | 587-847 | not yet reported which blocks → | Iristel Inc. | 154E | Valleyview | — |
| 2016-02-12 | 587-848 | not yet reported which blocks → | Iristel Inc. | 154E | Strathmore | — |
| 2016-02-12 | 587-856 | not yet reported which blocks → | Iristel Inc. | 154E | Vauxhall | — |
| 2016-02-12 | 587-857 | not yet reported which blocks → | Iristel Inc. | 154E | Veteran | — |
| 2016-02-12 | 587-858 | not yet reported which blocks → | Iristel Inc. | 154E | Vulcan | — |
| 2016-02-12 | 616-591 | 0–9 XXXall 10 · 5 holders which blocks → | COMCAST IP PHONE, LLC | 318J | GRAND RPDS | MI |
| 2016-02-12 | 616-727 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLCV - MI | 543C | ADA | MI |
| 2016-02-12 | 628-220 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | SNFC CNTRL | CA |
| 2016-02-12 | 709-910 | not yet reported which blocks → | Iristel Inc. | 154E | Upper Island Cove | — |
| 2016-02-12 | 778-906 | not yet reported which blocks → | Iristel Inc. | 154E | Squamish | — |
| 2016-02-12 | 805-707 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - CA | 649C | OJAI | CA |
| 2016-02-12 | 845-403 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC- NY | 384C | SPRING VLY | NY |
| 2016-02-12 | 873-736 | not yet reported which blocks → | Iristel Inc. | 154E | Ville-Marie | — |
| 2016-02-12 | 902-917 | not yet reported which blocks → | Iristel Inc. | 154E | Shubenacadie | — |
| 2016-02-12 | 902-918 | not yet reported which blocks → | Iristel Inc. | 154E | Summerside | — |
| 2016-02-12 | 902-920 | not yet reported which blocks → | Iristel Inc. | 154E | Truro | — |
| 2016-02-12 | 918-956 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF OKLAHOMA, LLC - OK | 384H | CLEVELAND | OK |
| 2016-02-11 | 316-333 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF KANSAS, LLC - KS | 018H | NEWTON | KS |
| 2016-02-11 | 475-470 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - CT | 639C | NORWALK | CT |
| 2016-02-11 | 506-709 | not yet reported which blocks → | Iristel Inc. | 154E | Richibucto | — |
| 2016-02-11 | 506-710 | not yet reported which blocks → | Iristel Inc. | 154E | Sackville | — |
| 2016-02-11 | 506-712 | not yet reported which blocks → | Iristel Inc. | 154E | Shediac | — |
| 2016-02-11 | 518-509 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | ROUND LAKE | NY |
| 2016-02-11 | 587-494 | not yet reported which blocks → | TELUS | 8084 | Taber | — |
| 2016-02-11 | 587-849 | not yet reported which blocks → | Iristel Inc. | 154E | Spirit River | — |
| 2016-02-11 | 587-850 | not yet reported which blocks → | Iristel Inc. | 154E | Ponoka | — |
| 2016-02-11 | 587-851 | not yet reported which blocks → | Iristel Inc. | 154E | Rocky Mountain House | — |
| 2016-02-11 | 587-852 | not yet reported which blocks → | Iristel Inc. | 154E | Sexsmith | — |
| 2016-02-11 | 587-853 | not yet reported which blocks → | Iristel Inc. | 154E | Spruce Grove | — |
| 2016-02-11 | 587-875 | not yet reported which blocks → | Iristel Inc. | 154E | Pincher Creek | — |
| 2016-02-11 | 626-349 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | ALHAMBRA | CA |
| 2016-02-11 | 639-393 | not yet reported which blocks → | Iristel Inc. | 154E | Outlook | — |
| 2016-02-11 | 639-394 | not yet reported which blocks → | Iristel Inc. | 154E | Rouleau | — |
| 2016-02-11 | 650-750 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - CA | 649C | HALFMOONBY | CA |
| 2016-02-11 | 731-318 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | MILAN | TN |
| 2016-02-11 | 731-330 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | TRENTON | TN |
| 2016-02-11 | 778-719 | not yet reported which blocks → | Iristel Inc. | 154E | Pineview | — |
| 2016-02-11 | 778-720 | not yet reported which blocks → | Iristel Inc. | 154E | Princeton | — |
| 2016-02-11 | 782-825 | not yet reported which blocks → | Iristel Inc. | 154E | Port Hawkesbury | — |
| 2016-02-11 | 808-367 | 0–9 XXXall 10 · 3 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | HONOLULU | HI |
| 2016-02-11 | 857-577 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - MA | 892D | CHARLESTN | MA |
| 2016-02-11 | 873-735 | not yet reported which blocks → | Iristel Inc. | 154E | Plessisville | — |
| 2016-02-11 | 878-238 | 0–9 XXXall 10 · 4 holders which blocks → | LAUREL HIGHLAND TELEPHONE COMPANY - PA | 738H | LIGONIER | PA |
| 2016-02-11 | 916-975 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - CA | 649C | SO PLACER | CA |
| 2016-02-10 | 314-701 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - MO | 093F | MEHLVILLE | MO |
| 2016-02-10 | 331-771 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC | 224C | ST CHARLES | IL |
| 2016-02-10 | 343-341 | not yet reported which blocks → | Iristel Inc. | 154E | Perth | — |
| 2016-02-10 | 412-410 | 0–9 XXXall 10 · 4 holders which blocks → | BARR TELL USA, INC. - PA | 752H | PTTSBGZON1 | PA |
| 2016-02-10 | 506-707 | not yet reported which blocks → | Iristel Inc. | 154E | Perth-Andover | — |
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.