NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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, all time — NPA 249
Fibernetics Corporation 142
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2020-12-17 249-641 not yet reported which blocks → Fibernetics Corporation 464D Havelock —
2020-12-17 249-642 not yet reported which blocks → Fibernetics Corporation 464D Hastings —
2020-12-17 249-643 not yet reported which blocks → Fibernetics Corporation 464D Burleigh Falls —
2020-12-17 249-644 not yet reported which blocks → Fibernetics Corporation 464D Buckhorn —
2020-12-17 249-645 not yet reported which blocks → Fibernetics Corporation 464D Bridgenorth —
2020-12-16 249-646 not yet reported which blocks → Fibernetics Corporation 464D Bethany —
2020-12-16 249-647 not yet reported which blocks → Fibernetics Corporation 464D Bailieboro —
2020-12-16 249-648 not yet reported which blocks → Fibernetics Corporation 464D Apsley —
2020-11-26 249-660 not yet reported which blocks → Fibernetics Corporation 464D Collingwood —
2020-10-06 249-668 not yet reported which blocks → Fibernetics Corporation 464D Borden-Angus —
2020-10-06 249-669 not yet reported which blocks → Fibernetics Corporation 464D Brechin —
2020-10-06 249-671 not yet reported which blocks → Fibernetics Corporation 464D Creemore —
2020-10-06 249-673 not yet reported which blocks → Fibernetics Corporation 464D Lafontaine —
2020-10-06 249-674 not yet reported which blocks → Fibernetics Corporation 464D Moonstone —
2020-10-06 249-675 not yet reported which blocks → Fibernetics Corporation 464D Port McNicoll —
2020-10-06 249-676 not yet reported which blocks → Fibernetics Corporation 464D Sebright —
2020-10-06 249-677 not yet reported which blocks → Fibernetics Corporation 464D Waubaushene —
2020-10-05 249-667 not yet reported which blocks → Fibernetics Corporation 464D Bluewater —
2020-10-05 249-670 not yet reported which blocks → Fibernetics Corporation 464D Christian Island —
2020-10-05 249-672 not yet reported which blocks → Fibernetics Corporation 464D Elmvale —
2020-09-22 249-665 not yet reported which blocks → Fibernetics Corporation 464D Pefferlaw —
2020-09-22 249-666 not yet reported which blocks → Fibernetics Corporation 464D Udora —
2020-09-09 249-207 not yet reported which blocks → Fibernetics Corporation 464D Lefroy —
2020-09-09 249-208 not yet reported which blocks → Fibernetics Corporation 464D Oro —
2020-07-23 249-394 not yet reported which blocks → Fibernetics Corporation 464D Pointe Au Baril —
2020-07-23 249-395 not yet reported which blocks → Fibernetics Corporation 464D Port Carling —
2020-07-23 249-396 not yet reported which blocks → Fibernetics Corporation 464D Rosseau —
2020-07-23 249-397 not yet reported which blocks → Fibernetics Corporation 464D Sundridge —
2020-07-23 249-398 not yet reported which blocks → Fibernetics Corporation 464D Windermere —
2020-07-20 249-389 not yet reported which blocks → Fibernetics Corporation 464D Bala —
2020-07-20 249-390 not yet reported which blocks → Fibernetics Corporation 464D Bracebridge —
2020-07-20 249-391 not yet reported which blocks → Fibernetics Corporation 464D Burk's Falls —
2020-07-20 249-392 not yet reported which blocks → Fibernetics Corporation 464D Dorset —
2020-07-20 249-393 not yet reported which blocks → Fibernetics Corporation 464D Mactier —
2020-07-17 249-549 not yet reported which blocks → Fibernetics Corporation 464D Huntsville —
2020-07-17 249-649 not yet reported which blocks → Fibernetics Corporation 464D Midland —
2020-07-17 249-664 not yet reported which blocks → Fibernetics Corporation 464D Stroud —
2020-06-11 249-661 not yet reported which blocks → Fibernetics Corporation 464D Severn Bridge —
2020-06-11 249-662 not yet reported which blocks → Fibernetics Corporation 464D Stayner —
2020-06-11 249-663 not yet reported which blocks → Fibernetics Corporation 464D Cookstown —
2015-09-25 249-889 not yet reported which blocks → Fibernetics Corporation 464D Sault Ste. Marie —
2012-03-22 249-888 not yet reported which blocks → Fibernetics Corporation 464D Barrie —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.