Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 21

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
2014-10-20	209-289	0–9 XXXall 10 · 5 holders which blocks →	XO CALIFORNIA, INC.	7262	MODESTO	CA
2014-10-20	385-347	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MURRAY	UT
2014-10-20	405-252	0–9 XXXall 10 · 5 holders which blocks →	SOUTHWESTERN BELL	9533	BRITTON	OK
2014-10-20	415-966	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BELVEDERE	CA
2014-10-20	417-633	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO	5814	SPRINGFLD	MO
2014-10-20	425-287	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	BOTHELL	WA
2014-10-20	512-214	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SAN MARCOS	TX
2014-10-20	607-374	0XXX1XXX8XXX9XXX · 3 holders which blocks →	AIRUS, INC. - NY	363H	BINGHAMTON	NY
2014-10-20	619-432	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SNDG SNDG	CA
2014-10-20	619-598	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CHULAVISTA	CA
2014-10-20	669-247	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SNJS NORTH	CA
2014-10-20	669-254	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CAMPBELL	CA
2014-10-20	701-805	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PEERLESS NETWORK OF NORTH DAKOTA, LLC	460H	BISMARCK	ND
2014-10-20	716-389	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	TONAWANDA	NY
2014-10-20	716-423	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	TONAWANDA	NY
2014-10-20	747-234	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA	7240	BRBN BRBN	CA
2014-10-20	778-557	not yet reported which blocks →	Fibernetics Corporation	464D	Victoria	—
2014-10-20	832-841	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	RICHMNRNBG	TX
2014-10-20	845-293	0–9 XXXall 10 · 5 holders which blocks →	AIRUS, INC. - NY	363H	POUGHKEPSI	NY
2014-10-20	909-551	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	DIAMONDBAR	CA
2014-10-20	939-484	0–9 XXXall 10 · 2 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	SANTURCE	PR
2014-10-20	949-647	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SADLBK VLY	CA
2014-10-20	951-472	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MORENO	CA
2014-10-20	956-606	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LAREDO	TX
2014-10-20	956-678	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WESLACO	TX
2014-10-17	204-606	not yet reported which blocks →	Comwave Networks	160G	Oakbank	—
2014-10-17	204-650	not yet reported which blocks →	Comwave Networks	160G	Brandon	—
2014-10-17	204-690	not yet reported which blocks →	Comwave Networks	160G	Inglis	—
2014-10-17	314-349	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ST LOUIS	MO
2014-10-17	323-597	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	MONTEBELLO	CA
2014-10-17	385-249	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2014-10-17	424-376	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	TORRANCE	CA
2014-10-17	442-264	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	OCSD OCSD	CA
2014-10-17	470-424	0–9 XXXwhole prefix which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	ATLANTA	GA
2014-10-17	480-868	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2014-10-17	484-864	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	PHPHSBZN30	PA
2014-10-17	506-846	not yet reported which blocks →	Bell Mobility Aliant	329A	Saint John	—
2014-10-17	520-729	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	TUCSON	AZ
2014-10-17	530-691	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	REDDING	CA
2014-10-17	570-202	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	STROUDSBG	PA
2014-10-17	585-434	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ROCHESTER	NY
2014-10-17	586-236	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2014-10-17	586-385	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2014-10-17	586-395	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2014-10-17	586-606	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WARREN	MI
2014-10-17	586-638	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WARREN	MI
2014-10-17	586-767	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	WARREN	MI
2014-10-17	587-601	not yet reported which blocks →	Iristel Inc.	154E	Fort McMurray	—
2014-10-17	619-586	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	NATIONALCY	CA
2014-10-17	650-460	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PALO ALTO	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.