Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, last 30 days — NPA 548

Rogers Communications Canada Inc. (Cable) 2

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
2021-01-06	548-264	not yet reported which blocks →	Fibernetics Corporation	464D	Maidstone	—
2021-01-06	548-265	not yet reported which blocks →	Fibernetics Corporation	464D	McGregor	—
2021-01-06	548-266	not yet reported which blocks →	Fibernetics Corporation	464D	Pelee Island	—
2021-01-06	548-267	not yet reported which blocks →	Fibernetics Corporation	464D	Wheatley	—
2020-12-11	548-249	not yet reported which blocks →	Fibernetics Corporation	464D	Belle River	—
2020-12-03	548-240	not yet reported which blocks →	Fibernetics Corporation	464D	Melbourne	—
2020-12-03	548-241	not yet reported which blocks →	Fibernetics Corporation	464D	Mount Brydges	—
2020-12-03	548-242	not yet reported which blocks →	Fibernetics Corporation	464D	Wardsville	—
2020-12-03	548-243	not yet reported which blocks →	Fibernetics Corporation	464D	Dorchester	—
2020-12-03	548-244	not yet reported which blocks →	Fibernetics Corporation	464D	Harrietsville	—
2020-12-03	548-245	not yet reported which blocks →	Fibernetics Corporation	464D	Thorndale	—
2020-12-03	548-246	not yet reported which blocks →	Fibernetics Corporation	464D	Ilderton	—
2020-12-03	548-247	not yet reported which blocks →	Fibernetics Corporation	464D	Kerwood	—
2020-12-02	548-239	not yet reported which blocks →	Fibernetics Corporation	464D	Belmont	—
2020-12-01	548-234	not yet reported which blocks →	Fibernetics Corporation	464D	Ailsa Craig	—
2020-12-01	548-235	not yet reported which blocks →	Fibernetics Corporation	464D	Centralia	—
2020-12-01	548-236	not yet reported which blocks →	Fibernetics Corporation	464D	Crediton	—
2020-12-01	548-237	not yet reported which blocks →	Fibernetics Corporation	464D	Lucan	—
2020-12-01	548-238	not yet reported which blocks →	Fibernetics Corporation	464D	Nairn	—
2020-11-27	548-570	not yet reported which blocks →	Fibernetics Corporation	464D	Blyth	—
2020-11-27	548-571	not yet reported which blocks →	Fibernetics Corporation	464D	Brussels	—
2020-11-27	548-572	not yet reported which blocks →	Fibernetics Corporation	464D	Hensall	—
2020-11-27	548-573	not yet reported which blocks →	Fibernetics Corporation	464D	Lucknow	—
2020-11-27	548-574	not yet reported which blocks →	Fibernetics Corporation	464D	Seaforth	—
2020-11-27	548-575	not yet reported which blocks →	Fibernetics Corporation	464D	Wingham	—
2020-11-26	548-569	not yet reported which blocks →	Fibernetics Corporation	464D	Auburn	—
2020-11-25	548-559	not yet reported which blocks →	Fibernetics Corporation	464D	Simcoe	—
2020-11-25	548-560	not yet reported which blocks →	Fibernetics Corporation	464D	Stratford	—
2020-09-11	548-566	not yet reported which blocks →	Fibernetics Corporation	464D	Glencoe	—
2020-09-11	548-567	not yet reported which blocks →	Fibernetics Corporation	464D	Lambeth	—
2020-09-11	548-568	not yet reported which blocks →	Fibernetics Corporation	464D	Parkhill	—
2020-07-31	548-561	not yet reported which blocks →	Fibernetics Corporation	464D	Amherstburg	—
2020-07-31	548-562	not yet reported which blocks →	Fibernetics Corporation	464D	Essex	—
2020-07-31	548-563	not yet reported which blocks →	Fibernetics Corporation	464D	Kingsville	—
2020-07-31	548-564	not yet reported which blocks →	Fibernetics Corporation	464D	Leamington	—
2020-07-31	548-565	not yet reported which blocks →	Fibernetics Corporation	464D	Tecumseh	—
2020-07-23	548-232	not yet reported which blocks →	ISP Telecom Inc.	4727	Bright's Grove	—
2020-07-23	548-233	not yet reported which blocks →	ISP Telecom Inc.	4727	Petrolia	—
2020-06-11	548-248	not yet reported which blocks →	Fibernetics Corporation	464D	Goderich	—
2020-05-20	548-875	not yet reported which blocks →	ISP Telecom Inc.	4727	Leamington	—
2020-05-20	548-876	not yet reported which blocks →	ISP Telecom Inc.	4727	Tecumseh	—
2020-05-19	548-722	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Waterford	—
2020-05-19	548-878	not yet reported which blocks →	ISP Telecom Inc.	4727	Wallaceburg	—
2020-05-14	548-522	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Elora	—
2020-05-05	548-994	not yet reported which blocks →	TELUS Mobility	8303	Kitchener-Waterloo	—
2020-01-30	548-900	not yet reported which blocks →	Iristel Inc.	154E	Brantford	—
2020-01-21	548-490	not yet reported which blocks →	Iristel Inc.	154E	Kitchener-Waterloo	—
2019-12-20	548-255	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Kitchener-Waterloo	—
2019-12-11	548-869	not yet reported which blocks →	ISP Telecom Inc.	4727	Baden	—
2019-12-11	548-870	not yet reported which blocks →	ISP Telecom Inc.	4727	St. Clements	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.