Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026

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 343

Rogers Communications Canada Inc. (Cable) 1

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
2020-10-14	343-454	not yet reported which blocks →	Fibernetics Corporation	464D	Alfred	—
2020-10-14	343-455	not yet reported which blocks →	Fibernetics Corporation	464D	Clarence Creek	—
2020-10-14	343-456	not yet reported which blocks →	Fibernetics Corporation	464D	Embrun	—
2020-10-14	343-457	not yet reported which blocks →	Fibernetics Corporation	464D	Plantagenet	—
2020-10-14	343-458	not yet reported which blocks →	Fibernetics Corporation	464D	Rockland	—
2020-10-14	343-573	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2020-09-30	343-653	not yet reported which blocks →	Westport Telephone Company Limited	920D	Elgin	—
2020-09-25	343-353	not yet reported which blocks →	Iristel Inc.	154E	Kanata-Stittsville	—
2020-09-25	343-946	not yet reported which blocks →	Iristel Inc.	154E	Bancroft	—
2020-09-21	343-314	not yet reported which blocks →	Iristel Inc.	154E	Cornwall	—
2020-09-21	343-504	not yet reported which blocks →	Iristel Inc.	154E	Brockville	—
2020-09-11	343-342	not yet reported which blocks →	Iristel Inc.	154E	Vankleek Hill	—
2020-09-11	343-894	not yet reported which blocks →	Fibernetics Corporation	464D	Sydenham	—
2020-09-10	343-892	not yet reported which blocks →	Fibernetics Corporation	464D	Bath	—
2020-09-10	343-893	not yet reported which blocks →	Fibernetics Corporation	464D	Napanee	—
2020-09-09	343-638	not yet reported which blocks →	Fibernetics Corporation	464D	Frankford	—
2020-09-09	343-639	not yet reported which blocks →	Fibernetics Corporation	464D	Marmora	—
2020-09-09	343-640	not yet reported which blocks →	Fibernetics Corporation	464D	Plevna	—
2020-09-09	343-641	not yet reported which blocks →	Fibernetics Corporation	464D	Stirling	—
2020-09-09	343-642	not yet reported which blocks →	Fibernetics Corporation	464D	Tweed	—
2020-09-01	343-655	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—
2020-08-14	343-578	not yet reported which blocks →	ISP Telecom Inc.	4727	Harrowsmith	—
2020-08-13	343-559	not yet reported which blocks →	ISP Telecom Inc.	4727	Arden	—
2020-08-13	343-560	not yet reported which blocks →	ISP Telecom Inc.	4727	Bloomfield	—
2020-08-13	343-561	not yet reported which blocks →	ISP Telecom Inc.	4727	Cardiff	—
2020-08-13	343-562	not yet reported which blocks →	ISP Telecom Inc.	4727	Picton	—
2020-08-13	343-577	not yet reported which blocks →	ISP Telecom Inc.	4727	Bath	—
2020-07-23	343-515	not yet reported which blocks →	ISP Telecom Inc.	4727	Arnprior	—
2020-07-23	343-516	not yet reported which blocks →	ISP Telecom Inc.	4727	Carp	—
2020-07-23	343-517	not yet reported which blocks →	ISP Telecom Inc.	4727	Constance Bay	—
2020-07-23	343-519	not yet reported which blocks →	ISP Telecom Inc.	4727	Kemptville	—
2020-07-21	343-463	not yet reported which blocks →	TELUS Mobility	8303	Ottawa-Hull	—
2020-06-09	343-643	not yet reported which blocks →	Fibernetics Corporation	464D	Brockville	—
2020-05-20	343-891	not yet reported which blocks →	ISP Telecom Inc.	4727	Casselman	—
2020-05-19	343-890	not yet reported which blocks →	ISP Telecom Inc.	4727	Almonte	—
2020-05-13	343-347	not yet reported which blocks →	Fibernetics Corporation	464D	Arnprior	—
2020-05-13	343-348	not yet reported which blocks →	Fibernetics Corporation	464D	Cumberland	—
2020-05-13	343-349	not yet reported which blocks →	Fibernetics Corporation	464D	Gloucester	—
2020-05-13	343-350	not yet reported which blocks →	Fibernetics Corporation	464D	Orleans	—
2020-05-13	343-351	not yet reported which blocks →	Fibernetics Corporation	464D	Richmond	—
2020-04-24	343-293	not yet reported which blocks →	Fibernetics Corporation	464D	Kingston	—
2020-03-27	343-571	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2020-03-27	343-572	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2020-02-26	343-453	not yet reported which blocks →	Iristel Inc.	154E	Belleville	—
2020-02-13	343-553	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2020-02-05	343-698	not yet reported which blocks →	Bell Canada	8051	Manotick	—
2020-01-17	343-254	not yet reported which blocks →	Videotron Ltd.	787G	Ottawa-Hull	—
2020-01-08	343-552	not yet reported which blocks →	Bell Mobility	6574	Ottawa-Hull	—
2019-12-27	343-633	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—
2019-12-27	343-644	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.