Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 28

ONVOY, LLC - CA 26

NEW CINGULAR WIRELESS PCS, LLC - IL 25

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12

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
2012-01-17	778-633	not yet reported which blocks →	Fido Solutions Inc.	5643	Castlegar	—
2012-01-17	778-637	not yet reported which blocks →	Fido Solutions Inc.	5643	Vanderhoof	—
2012-01-17	778-638	not yet reported which blocks →	Fido Solutions Inc.	5643	Quesnel	—
2012-01-17	778-639	not yet reported which blocks →	Fido Solutions Inc.	5643	Merritt	—
2012-01-17	813-867	0–9 XXXall 10 · 6 holders which blocks →	TERRA NOVA TELECOM, INC. - FL	382G	TAMPACEN	FL
2012-01-13	202-805	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC	6402	WSHNGTNZN1	DC
2012-01-13	312-888	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CHICGOZN01	IL
2012-01-13	330-616	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - OH	464C	NO CANTON	OH
2012-01-13	404-548	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2012-01-13	404-623	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2012-01-13	407-607	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	WINTERPARK	FL
2012-01-13	470-242	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA NE	GA
2012-01-13	708-518	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OAK FOR SO	IL
2012-01-13	786-440	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	NORTH DADE	FL
2012-01-13	786-660	0–9 XXXall 10 · 2 holders which blocks →	TERRA NOVA TELECOM, INC. - FL	382G	MIAMI	FL
2012-01-13	904-802	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	JACKSONVL	FL
2012-01-13	904-888	0–9 XXXall 10 · 3 holders which blocks →	TERRA NOVA TELECOM, INC. - FL	382G	JACKSONVL	FL
2012-01-13	954-314	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - FL	937C	FTLAUDERDL	FL
2012-01-12	205-234	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	BIRMINGHAM	AL
2012-01-12	256-202	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	GUNTERSVL	AL
2012-01-12	256-224	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	ARAB	AL
2012-01-12	334-540	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	PHENIXCITY	AL
2012-01-12	575-352	not yet reported which blocks →	PLATEAU TELECOMMUNICATIONS, INC. - NM	777B	SPRINGER	NM
2012-01-12	760-919	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	IMPERIAL	CA
2012-01-12	805-366	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	OXNARD	CA
2012-01-12	918-817	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	SALLISAW	OK
2012-01-11	581-646	not yet reported which blocks →	Videotron Ltd.	8306	St-Jean-de-Dieu	—
2012-01-11	775-644	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	BAKER	NV
2012-01-11	872-202	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	CHICGOZN01	IL
2012-01-10	513-512	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - OH	7532	CINCINNATI	OH
2012-01-10	901-206	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	MEMPHIS	TN
2012-01-10	909-346	0–9 XXXall 10 · 5 holders which blocks →	METROPCS NETWORKS, LLC	899D	FONTANA	CA
2012-01-09	253-442	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	TACOMA	WA
2012-01-09	317-540	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	INDIANAPLS	IN
2012-01-09	317-551	0–9 XXXwhole prefix which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	INDIANAPLS	IN
2012-01-09	443-202	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BALTIMORE	MD
2012-01-09	502-909	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LOUISVILLE	KY
2012-01-09	505-434	not yet reported which blocks →	PLATEAU TELECOMMUNICATIONS, INC. - NM	777B	LAS VEGAS	NM
2012-01-09	939-322	0–9 XXXwhole prefix which blocks →	SUNCOM DBA T-MOBILE USA	8645	SANTURCE	PR
2012-01-06	249-301	not yet reported which blocks →	TELUS Integrated Communications	2782	Midland	—
2012-01-06	331-201	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	DOWNERSGRV	IL
2012-01-06	587-732	not yet reported which blocks →	Fido Solutions Inc.	5643	Athabasca	—
2012-01-06	587-733	not yet reported which blocks →	Fido Solutions Inc.	5643	Rocky Mountain House	—
2012-01-06	587-736	not yet reported which blocks →	Fido Solutions Inc.	5643	Stettler	—
2012-01-06	587-737	not yet reported which blocks →	Fido Solutions Inc.	5643	High River	—
2012-01-06	587-738	not yet reported which blocks →	Fido Solutions Inc.	5643	Ponoka	—
2012-01-06	587-739	not yet reported which blocks →	Fido Solutions Inc.	5643	Cardston	—
2012-01-05	334-336	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	SLOCOMB	AL
2012-01-05	587-272	not yet reported which blocks →	Shaw Telecom Inc.	497E	Red Deer	—
2012-01-05	705-450	not yet reported which blocks →	Shaw Telecom Inc.	497E	Sault Ste. Marie	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.