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
2020-04-21	505-396	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	LOS ALAMOS	NM
2020-04-21	515-506	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	UNITED STATES CELLULAR - IA	6266	ADEL	IA
2020-04-21	575-259	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM	6573	LAS CRUCES	NM
2020-04-21	682-328	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GLENDALE	TX
2020-04-21	720-798	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	DENVER	CO
2020-04-21	825-857	not yet reported which blocks →	Fibernetics Corporation	464D	Cochrane	—
2020-04-21	825-858	not yet reported which blocks →	Fibernetics Corporation	464D	Canmore	—
2020-04-21	825-859	not yet reported which blocks →	Fibernetics Corporation	464D	Airdrie	—
2020-04-21	925-341	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LIVERMORE	CA
2020-04-21	949-979	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	IRVINE	CA
2020-04-20	253-319	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WA	006F	TACOMA	WA
2020-04-20	267-996	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - PA	4007	PHLDLPHZN1	PA
2020-04-20	279-205	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SCRM MAIN	CA
2020-04-20	435-334	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - UT	871E	FILLMORE	UT
2020-04-20	520-453	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ	6572	TOMBSTONE	AZ
2020-04-20	657-435	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	WESTMINSTR	CA
2020-04-20	657-436	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SANTA ANA	CA
2020-04-20	862-362	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	NETCONG	NJ
2020-04-20	959-214	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CT	4800	WASHINGTON	CT
2020-04-20	986-686	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - ID	689F	DONNELLY	ID
2020-04-20	986-886	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	ONVOY, LLC - ID	689F	NEWMEADOWS	ID
2020-04-17	612-448	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MN	5256	TWINCITIES	MN
2020-04-17	825-854	not yet reported which blocks →	Fibernetics Corporation	464D	Strathmore	—
2020-04-17	825-855	not yet reported which blocks →	Fibernetics Corporation	464D	Okotoks	—
2020-04-17	825-856	not yet reported which blocks →	Fibernetics Corporation	464D	High River	—
2020-04-16	249-895	not yet reported which blocks →	ISP Telecom Inc.	4727	Wasaga Beach	—
2020-04-16	272-266	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - PA	002F	CATAWISSA	PA
2020-04-16	332-230	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN01	NY
2020-04-16	431-931	not yet reported which blocks →	Fibernetics Corporation	464D	Portage La Prairie	—
2020-04-16	610-483	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	ALLENTOWN	PA
2020-04-16	701-773	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - ND	452F	KINDRED	ND
2020-04-16	757-832	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	BOYKINS	VA
2020-04-16	757-982	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	CAPECHARLS	VA
2020-04-16	762-240	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - GA	8392	COLUMBUS	GA
2020-04-16	769-217	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	MCCOMB	MS
2020-04-16	872-282	0–9 XXXwhole prefix which blocks →	ONVOY, LLC	224C	CHICGOZN01	IL
2020-04-16	954-694	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - FL	8300	FTLAUDERDL	FL
2020-04-16	980-890	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NC	638E	CHARLOTTE	NC
2020-04-15	213-518	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	LSAN DA 07	CA
2020-04-15	236-446	not yet reported which blocks →	Bell Mobility	6574	Vancouver	—
2020-04-15	470-576	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2020-04-15	470-603	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA NE	GA
2020-04-15	928-361	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - AZ	587F	PIMA	AZ
2020-04-15	929-521	0–9 XXXall 10 · 8 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NWYRCYZN08	NY
2020-04-15	970-740	0–9 XXXall 10 · 6 holders which blocks →	QWEST CORPORATION	9636	STERLING	CO
2020-04-14	681-540	0XXX1XXX4XXX6XXX8XXX · 3 holders which blocks →	ONVOY, LLC - WV	449F	HARPESFRRY	WV
2020-04-14	715-328	0XXX which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	DOWNSVILLE	WI
2020-04-14	804-581	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	SALUDA	VA
2020-04-14	916-699	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	RSVL MAIN	CA
2020-04-13	234-270	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	UNIONTOWN	OH

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.