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
2013-05-16	641-450	0–9 XXXall 10 · 5 holders which blocks →	NORTHLAND COMMUNICATIONS, INC. - IA	068H	MASON CITY	IA
2013-05-16	786-614	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2013-05-16	786-616	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	MIAMI	FL
2013-05-16	812-802	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	EVANSVILLE	IN
2013-05-16	862-309	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	MORRISTOWN	NJ
2013-05-15	206-258	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	SEATTLE	WA
2013-05-15	210-810	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SANANTONIO	TX
2013-05-15	226-670	not yet reported which blocks →	Comwave Networks	160G	Wardsville	—
2013-05-15	226-690	not yet reported which blocks →	Comwave Networks	160G	Glencoe	—
2013-05-15	289-592	not yet reported which blocks →	Comwave Networks	160G	Schomberg	—
2013-05-15	289-593	not yet reported which blocks →	Comwave Networks	160G	Thornhill	—
2013-05-15	289-595	not yet reported which blocks →	Comwave Networks	160G	Uxbridge	—
2013-05-15	289-596	not yet reported which blocks →	Comwave Networks	160G	Woodbridge	—
2013-05-15	289-614	not yet reported which blocks →	Comwave Networks	160G	Aurora	—
2013-05-15	289-615	not yet reported which blocks →	Comwave Networks	160G	Bethesda	—
2013-05-15	289-616	not yet reported which blocks →	Comwave Networks	160G	Bolton	—
2013-05-15	289-617	not yet reported which blocks →	Comwave Networks	160G	Gormley	—
2013-05-15	289-618	not yet reported which blocks →	Comwave Networks	160G	King City	—
2013-05-15	289-661	not yet reported which blocks →	Comwave Networks	160G	Markham	—
2013-05-15	289-662	not yet reported which blocks →	Comwave Networks	160G	Mount Albert	—
2013-05-15	289-663	not yet reported which blocks →	Comwave Networks	160G	Newmarket	—
2013-05-15	289-664	not yet reported which blocks →	Comwave Networks	160G	Nobleton	—
2013-05-15	289-665	not yet reported which blocks →	Comwave Networks	160G	Oak Ridges	—
2013-05-15	289-867	not yet reported which blocks →	Comwave Networks	160G	Richmond Hill	—
2013-05-15	586-210	0–9 XXXall 10 · 6 holders which blocks →	FIRST COMMUNICATIONS, LLC	460K	NEWBALTIMR	MI
2013-05-15	720-683	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	FORTLUPTON	CO
2013-05-15	832-705	0–9 XXXall 10 · 3 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2013-05-15	832-809	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL	9533	BARKER	TX
2013-05-15	848-205	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ	6391	METUCHEN	NJ
2013-05-15	939-709	0XXX1XXX · 2 holders which blocks →	NATURAL G.C. INC. - PR	985G	RIOPIEDRAS	PR
2013-05-15	954-716	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	FTLAUDERDL	FL
2013-05-14	415-712	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	BELVEDERE	CA
2013-05-14	510-671	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	OKLD ALMD	CA
2013-05-14	669-227	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNJS WEST	CA
2013-05-14	909-375	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	BIGBEAR CY	CA
2013-05-13	313-725	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	DETROITZN1	MI
2013-05-13	404-960	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2013-05-13	571-699	0–9 XXXall 10 · 6 holders which blocks →	NUSO, LLC	551G	WSNGTNZN08	VA
2013-05-13	931-202	0–9 XXXall 10 · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	CROSSVILLE	TN
2013-05-10	226-818	not yet reported which blocks →	Mornington Communications Co-operative Ltd.	400E	Drayton	—
2013-05-10	240-802	0–9 XXXall 10 · 7 holders which blocks →	NUSO, LLC	551G	WSHNGTNZN2	MD
2013-05-10	431-282	not yet reported which blocks →	MTS Inc.	991B	Strathclair	—
2013-05-10	431-283	not yet reported which blocks →	MTS Inc.	991B	Riverton	—
2013-05-10	431-284	not yet reported which blocks →	MTS Inc.	991B	Manitou	—
2013-05-10	431-285	not yet reported which blocks →	MTS Inc.	991B	Gillam	—
2013-05-10	613-939	not yet reported which blocks →	Bell Canada	8051	Ottawa-Hull	—
2013-05-10	667-305	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	PIKESVILLE	MD
2013-05-09	206-602	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	SEATTLE	WA
2013-05-09	432-703	0–9 XXXall 10 · 4 holders which blocks →	SOUTHWESTERN BELL	9533	ODESSA	TX
2013-05-09	614-980	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	COLUMBUS	OH

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.