Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
2015-01-19	520-528	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	TUCSON	AZ
2015-01-19	520-848	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	TUCSON	AZ
2015-01-19	623-219	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	PHOENIX	AZ
2015-01-19	819-272	not yet reported which blocks →	Iristel Inc.	154E	Kuujjuaq	—
2015-01-19	928-615	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	YUMA	AZ
2015-01-19	949-372	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 TELECOM OF CALIFORNIA, LP - CA	7718	IRVINE	CA
2015-01-16	407-969	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ORLANDO	FL
2015-01-16	424-384	0–9 XXXall 10 · 7 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	SNMN MRVS	CA
2015-01-16	442-256	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	INDIO	CA
2015-01-16	442-271	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	EL CENTRO	CA
2015-01-16	469-978	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2015-01-16	562-241	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ALAMITOS	CA
2015-01-16	619-627	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	EL CAJON	CA
2015-01-16	619-874	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CHULAVISTA	CA
2015-01-16	651-425	0–9 XXXall 10 · 2 holders which blocks →	QWEST CORPORATION	9631	TWINCITIES	MN
2015-01-16	682-978	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	ARLINGTON	TX
2015-01-16	848-226	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	TOMS RIVER	NJ
2015-01-16	864-971	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	HODGES	SC
2015-01-16	870-978	0XXX2XXX7XXX8XXX · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	AMITY	AR
2015-01-16	940-315	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	DENTON	TX
2015-01-15	234-409	0XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	SPENCER	OH
2015-01-15	234-603	0XXX2XXX3XXX4XXX6XXX7XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OH	4863	CRESTON	OH
2015-01-15	318-660	0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA LA - LLC	653C	SPRINGHILL	LA
2015-01-15	321-310	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	ORLANDO	FL
2015-01-15	321-440	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	ORLANDO	FL
2015-01-15	509-404	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	DAYTON	WA
2015-01-15	509-903	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	LIBERTY LK	WA
2015-01-15	615-571	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	NASHVILLE	TN
2015-01-15	623-633	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	PHOENIX	AZ
2015-01-15	630-381	0–9 XXXall 10 · 3 holders which blocks →	ILLINOIS BELL TEL CO	9329	YORKVILLE	IL
2015-01-15	716-395	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	LANCASTER	NY
2015-01-15	717-971	0–9 XXXall 10 · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	SHELLSVL	PA
2015-01-15	816-906	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO	7594	KANSASCITY	MO
2015-01-15	843-925	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC	6398	MONCKS COR	SC
2015-01-15	970-789	0XXX7XXX9XXX · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	SO SIDNEY	CO
2015-01-15	980-269	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	MONROE	NC
2015-01-15	980-677	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	GASTONIA	NC
2015-01-14	343-645	not yet reported which blocks →	Bell Mobility	6574	Belleville	—
2015-01-14	423-681	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	CHATTNOOGA	TN
2015-01-14	470-878	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ATLANTA SO	GA
2015-01-14	717-603	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	HARISBGZN1	PA
2015-01-14	843-941	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC	6398	BEAUFORT	SC
2015-01-14	865-410	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	KNOXVILLE	TN
2015-01-14	908-524	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 TELECOM OF NEW JERSEY, LP - NJ	2771	SOMERVILLE	NJ
2015-01-14	970-821	0–9 XXXall 10 · 4 holders which blocks →	QWEST CORPORATION	9636	FT COLLINS	CO
2015-01-13	208-809	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BOISE	ID
2015-01-13	385-352	0–9 XXXall 10 · 7 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7176	LEHI	UT
2015-01-13	501-509	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AR	5179	COY	AR
2015-01-13	586-312	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI
2015-01-13	586-499	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MT CLEMENS	MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.