Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 19

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
2016-07-07	639-516	not yet reported which blocks →	Distributel	081E	Perdue	—
2016-07-07	639-517	not yet reported which blocks →	Distributel	081E	Prudhomme	—
2016-07-07	639-518	not yet reported which blocks →	Distributel	081E	Radisson	—
2016-07-07	639-519	not yet reported which blocks →	Distributel	081E	Rosthern	—
2016-07-07	639-520	not yet reported which blocks →	Distributel	081E	Vonda	—
2016-07-07	639-521	not yet reported which blocks →	Distributel	081E	Wakaw	—
2016-07-07	639-522	not yet reported which blocks →	Distributel	081E	Waldheim	—
2016-07-07	639-523	not yet reported which blocks →	Distributel	081E	Watrous	—
2016-07-07	782-463	not yet reported which blocks →	Bragg Communications Inc.	4878	Lockeport	—
2016-07-07	813-296	0–9 XXXall 10 · 6 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TAMPASTH	FL
2016-07-07	865-770	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	KNOXVILLE	TN
2016-07-06	346-241	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	HOUSTON	TX
2016-07-06	432-232	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ODESSA	TX
2016-07-06	458-213	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - OR	750E	WALLOWA	OR
2016-07-06	469-356	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - TX	903C	NEVADA	TX
2016-07-06	480-493	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2016-07-06	520-330	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	TUCSON	AZ
2016-07-06	579-281	not yet reported which blocks →	TELUS Quebec	2243	St-Jerome	—
2016-07-06	579-282	not yet reported which blocks →	TELUS Quebec	2243	St-Calixte-de-Kilkenny	—
2016-07-06	579-283	not yet reported which blocks →	TELUS Quebec	2243	St-Lin	—
2016-07-06	579-284	not yet reported which blocks →	TELUS Quebec	2243	St-Hippolyte	—
2016-07-06	579-285	not yet reported which blocks →	TELUS Quebec	2243	St-Vincent-de-Paul	—
2016-07-06	646-815	0–9 XXXwhole prefix which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	NWYRCYZN01	NY
2016-07-06	646-816	0–9 XXXwhole prefix which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	NWYRCYZN01	NY
2016-07-06	828-529	2XXX3XXX9XXX · 3 holders which blocks →	WINDSTREAM NORTH CAROLINA, INC.	0476	TRYON	NC
2016-07-06	936-265	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - TX	903C	SHIRO	TX
2016-07-06	980-825	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC	6324	HARRISBURG	NC
2016-07-05	325-221	0–9 XXXall 10 · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	BRONTE	TX
2016-07-05	813-328	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	TAMPAWST	FL
2016-07-01	240-592	0–9 XXXwhole prefix which blocks →	VERIZON MARYLAND, INC.	9212	WSNG236Z13	MD
2016-07-01	475-217	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	STAMFORD	CT
2016-07-01	475-229	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT	6388	STAMFORD	CT
2016-07-01	559-214	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	FRESNO	CA
2016-07-01	628-204	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	NICASIO	CA
2016-07-01	628-241	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	SNFC JUNPR	CA
2016-07-01	628-252	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CORTEMADRA	CA
2016-07-01	951-409	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	ELSINORE	CA
2016-07-01	978-588	0–9 XXXall 10 · 4 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	AYER	MA
2016-06-30	236-434	not yet reported which blocks →	TELUS	8086	Masset	—
2016-06-30	248-934	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PONTIAC	MI
2016-06-30	248-983	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLCV - MI	543C	HOLLY	MI
2016-06-30	249-495	not yet reported which blocks →	Iristel Inc.	154E	Barrie	—
2016-06-30	540-418	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	BLACKSBURG	VA
2016-06-30	548-800	not yet reported which blocks →	Iristel Inc.	154E	Brantford	—
2016-06-30	615-821	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	SMYRNA	TN
2016-06-30	616-625	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLCV - MI	543C	CONKLIN	MI
2016-06-30	778-744	not yet reported which blocks →	Iristel Inc.	154E	Nanaimo	—
2016-06-30	873-771	not yet reported which blocks →	Iristel Inc.	154E	Rouyn-Noranda	—
2016-06-30	985-263	0–9 XXXall 10 · 8 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	PATTERSON	LA
2016-06-30	985-272	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	MANDEVILLE	LA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.