Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 873

Fibernetics Corporation 77

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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
2024-08-09	873-584	not yet reported which blocks →	Fibernetics Corporation	464D	Trois-Rivieres	—
2023-08-24	873-769	not yet reported which blocks →	Fibernetics Corporation	464D	Sherbrooke	—
2023-06-23	873-580	not yet reported which blocks →	Fibernetics Corporation	464D	Asbestos	—
2023-06-23	873-581	not yet reported which blocks →	Fibernetics Corporation	464D	Bromptonville	—
2023-06-23	873-582	not yet reported which blocks →	Fibernetics Corporation	464D	Cookshire	—
2023-06-23	873-583	not yet reported which blocks →	Fibernetics Corporation	464D	Windsor	—
2023-02-28	873-951	not yet reported which blocks →	Fibernetics Corporation	464D	Aylmer	—
2023-02-28	873-952	not yet reported which blocks →	Fibernetics Corporation	464D	Buckingham	—
2023-02-28	873-953	not yet reported which blocks →	Fibernetics Corporation	464D	Gatineau	—
2023-02-28	873-954	not yet reported which blocks →	Fibernetics Corporation	464D	St-Pierre-de-Wakefield	—
2023-02-01	873-895	not yet reported which blocks →	Fibernetics Corporation	464D	Lac-Megantic	—
2023-01-26	873-448	not yet reported which blocks →	Fibernetics Corporation	464D	Drummondville	—
2022-10-11	873-252	not yet reported which blocks →	Fibernetics Corporation	464D	Ottawa-Hull	—
2022-10-11	873-341	not yet reported which blocks →	Fibernetics Corporation	464D	Trois-Rivieres	—
2022-04-26	873-768	not yet reported which blocks →	Fibernetics Corporation	464D	Temiscaming	—
2021-03-18	873-758	not yet reported which blocks →	Fibernetics Corporation	464D	Fort-Coulonge	—
2021-03-18	873-759	not yet reported which blocks →	Fibernetics Corporation	464D	Gracefield	—
2021-03-18	873-760	not yet reported which blocks →	Fibernetics Corporation	464D	Grand-Remous	—
2021-03-18	873-761	not yet reported which blocks →	Fibernetics Corporation	464D	Kazabazua	—
2021-03-18	873-762	not yet reported which blocks →	Fibernetics Corporation	464D	Low	—
2021-03-18	873-763	not yet reported which blocks →	Fibernetics Corporation	464D	Luskville	—
2021-03-18	873-764	not yet reported which blocks →	Fibernetics Corporation	464D	Montebello	—
2021-03-18	873-765	not yet reported which blocks →	Fibernetics Corporation	464D	Papineauville	—
2021-03-18	873-766	not yet reported which blocks →	Fibernetics Corporation	464D	Thurso	—
2021-03-18	873-767	not yet reported which blocks →	Fibernetics Corporation	464D	Wakefield	—
2021-03-17	873-756	not yet reported which blocks →	Fibernetics Corporation	464D	Bouchette	—
2021-03-17	873-757	not yet reported which blocks →	Fibernetics Corporation	464D	Chapeau	—
2021-03-05	873-438	not yet reported which blocks →	Fibernetics Corporation	464D	St-Malo	—
2021-03-05	873-439	not yet reported which blocks →	Fibernetics Corporation	464D	Stoke	—
2021-03-05	873-440	not yet reported which blocks →	Fibernetics Corporation	464D	St-Sebastien (Frontenac Co.)	—
2021-03-05	873-441	not yet reported which blocks →	Fibernetics Corporation	464D	Weedon	—
2021-03-05	873-442	not yet reported which blocks →	Fibernetics Corporation	464D	Windsor	—
2021-03-05	873-443	not yet reported which blocks →	Fibernetics Corporation	464D	Wotton	—
2021-03-04	873-351	not yet reported which blocks →	Fibernetics Corporation	464D	La Patrie	—
2021-03-04	873-352	not yet reported which blocks →	Fibernetics Corporation	464D	Lac-Drolet	—
2021-03-04	873-366	not yet reported which blocks →	Fibernetics Corporation	464D	Richmond	—
2021-03-04	873-367	not yet reported which blocks →	Fibernetics Corporation	464D	Sawyerville	—
2021-03-04	873-368	not yet reported which blocks →	Fibernetics Corporation	464D	Scotstown	—
2021-03-04	873-369	not yet reported which blocks →	Fibernetics Corporation	464D	South Durham	—
2021-03-04	873-370	not yet reported which blocks →	Fibernetics Corporation	464D	St-Adolphe-de-Dudswell	—
2021-03-03	873-345	not yet reported which blocks →	Fibernetics Corporation	464D	Chartierville	—
2021-03-03	873-346	not yet reported which blocks →	Fibernetics Corporation	464D	Cookshire	—
2021-03-03	873-347	not yet reported which blocks →	Fibernetics Corporation	464D	Danville	—
2021-03-03	873-348	not yet reported which blocks →	Fibernetics Corporation	464D	Deauville	—
2021-03-03	873-349	not yet reported which blocks →	Fibernetics Corporation	464D	East Angus	—
2021-03-03	873-350	not yet reported which blocks →	Fibernetics Corporation	464D	East Hereford	—
2021-02-18	873-312	not yet reported which blocks →	Fibernetics Corporation	464D	Asbestos	—
2021-02-18	873-313	not yet reported which blocks →	Fibernetics Corporation	464D	Bishopton	—
2021-02-18	873-314	not yet reported which blocks →	Fibernetics Corporation	464D	Bromptonville	—
2021-02-18	873-315	not yet reported which blocks →	Fibernetics Corporation	464D	Bury	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.