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 365

Fibernetics Corporation 68

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
2024-12-31	365-352	not yet reported which blocks →	Fibernetics Corporation	464D	Brooklin	—
2024-12-31	365-409	not yet reported which blocks →	Fibernetics Corporation	464D	Newcastle	—
2024-09-06	365-491	not yet reported which blocks →	Fibernetics Corporation	464D	Aurora	—
2024-09-06	365-492	not yet reported which blocks →	Fibernetics Corporation	464D	Maple	—
2024-09-06	365-493	not yet reported which blocks →	Fibernetics Corporation	464D	Unionville	—
2024-06-24	365-627	not yet reported which blocks →	Fibernetics Corporation	464D	Clarkson	—
2024-06-24	365-628	not yet reported which blocks →	Fibernetics Corporation	464D	Malton	—
2024-06-24	365-629	not yet reported which blocks →	Fibernetics Corporation	464D	Port Credit	—
2024-06-24	365-630	not yet reported which blocks →	Fibernetics Corporation	464D	Streetsville	—
2023-10-27	365-488	not yet reported which blocks →	Fibernetics Corporation	464D	Brampton	—
2023-10-27	365-489	not yet reported which blocks →	Fibernetics Corporation	464D	Castlemore	—
2023-10-27	365-490	not yet reported which blocks →	Fibernetics Corporation	464D	Snelgrove	—
2023-09-06	365-981	not yet reported which blocks →	Fibernetics Corporation	464D	Burlington	—
2023-08-31	365-974	not yet reported which blocks →	Fibernetics Corporation	464D	St. Catharines-Thorold	—
2023-08-25	365-679	not yet reported which blocks →	Fibernetics Corporation	464D	Bowmanville	—
2023-08-09	365-982	not yet reported which blocks →	Fibernetics Corporation	464D	Binbrook	—
2023-08-09	365-983	not yet reported which blocks →	Fibernetics Corporation	464D	Dundas	—
2023-08-09	365-984	not yet reported which blocks →	Fibernetics Corporation	464D	Grimsby	—
2023-08-09	365-985	not yet reported which blocks →	Fibernetics Corporation	464D	West Lincoln	—
2023-08-09	365-986	not yet reported which blocks →	Fibernetics Corporation	464D	Winona	—
2023-01-09	365-496	not yet reported which blocks →	Fibernetics Corporation	464D	Ancaster	—
2023-01-09	365-497	not yet reported which blocks →	Fibernetics Corporation	464D	Hamilton	—
2023-01-09	365-498	not yet reported which blocks →	Fibernetics Corporation	464D	Stoney Creek	—
2022-11-11	365-348	not yet reported which blocks →	Fibernetics Corporation	464D	Milton	—
2022-11-11	365-349	not yet reported which blocks →	Fibernetics Corporation	464D	Oakville	—
2022-11-10	365-346	not yet reported which blocks →	Fibernetics Corporation	464D	Campbellville	—
2022-11-10	365-347	not yet reported which blocks →	Fibernetics Corporation	464D	Georgetown	—
2022-08-25	365-279	not yet reported which blocks →	Fibernetics Corporation	464D	Clarkson	—
2022-08-25	365-280	not yet reported which blocks →	Fibernetics Corporation	464D	Port Credit	—
2022-08-25	365-281	not yet reported which blocks →	Fibernetics Corporation	464D	Streetsville	—
2022-08-12	365-466	not yet reported which blocks →	Fibernetics Corporation	464D	Cayuga	—
2022-08-12	365-467	not yet reported which blocks →	Fibernetics Corporation	464D	Dunnville	—
2022-08-12	365-468	not yet reported which blocks →	Fibernetics Corporation	464D	Fisherville	—
2022-08-12	365-469	not yet reported which blocks →	Fibernetics Corporation	464D	Port Robinson	—
2022-08-12	365-470	not yet reported which blocks →	Fibernetics Corporation	464D	Ridgeway	—
2022-08-12	365-471	not yet reported which blocks →	Fibernetics Corporation	464D	Selkirk	—
2022-08-12	365-472	not yet reported which blocks →	Fibernetics Corporation	464D	Stevensville	—
2022-08-12	365-473	not yet reported which blocks →	Fibernetics Corporation	464D	Wainfleet	—
2022-08-12	365-474	not yet reported which blocks →	Fibernetics Corporation	464D	Wellandport	—
2022-02-18	365-684	not yet reported which blocks →	Fibernetics Corporation	464D	Malton	—
2022-02-17	365-683	not yet reported which blocks →	Fibernetics Corporation	464D	Cooksville	—
2021-09-27	365-371	not yet reported which blocks →	Fibernetics Corporation	464D	Binbrook	—
2021-09-27	365-372	not yet reported which blocks →	Fibernetics Corporation	464D	Hagersville	—
2021-09-27	365-373	not yet reported which blocks →	Fibernetics Corporation	464D	West Lincoln	—
2021-09-27	365-374	not yet reported which blocks →	Fibernetics Corporation	464D	Winona	—
2021-09-27	365-812	not yet reported which blocks →	Fibernetics Corporation	464D	Blackstock	—
2021-09-27	365-813	not yet reported which blocks →	Fibernetics Corporation	464D	Hampton	—
2021-09-27	365-814	not yet reported which blocks →	Fibernetics Corporation	464D	Newtonville	—
2021-09-27	365-815	not yet reported which blocks →	Fibernetics Corporation	464D	Orono	—
2021-02-03	365-370	not yet reported which blocks →	Fibernetics Corporation	464D	Brampton	—

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.