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
2016-12-28	484-659	0–9 XXXall 10 · 2 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	READING	PA
2016-12-28	539-313	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OK	5257	TULSA	OK
2016-12-28	873-673	not yet reported which blocks →	Fibernetics Corporation	464D	Gatineau	—
2016-12-28	978-690	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	LAWRENCE	MA
2016-12-27	424-423	0–9 XXXall 10 · 7 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	EL SEGUNDO	CA
2016-12-27	561-268	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	WPALMBEACH	FL
2016-12-27	747-291	0–9 XXXall 10 · 7 holders which blocks →	T-MOBILE USA, INC.	6529	BRBN BRBN	CA
2016-12-27	978-892	0–9 XXXwhole prefix which blocks →	VERIZON NEW ENGLAND INC.	9102	LAWRENCE	MA
2016-12-23	248-970	0–9 XXXall 10 · 6 holders which blocks →	CLEAR RATE COMMUNICATIONS, LLC	046L	W BLOOMFLD	MI
2016-12-23	314-818	0–9 XXXall 10 · 8 holders which blocks →	TELNYX LLC	073H	ST LOUIS	MO
2016-12-23	365-265	not yet reported which blocks →	IXICA Communications Inc.	812H	Victoria	—
2016-12-23	365-325	not yet reported which blocks →	IXICA Communications Inc.	812H	Castlemore	—
2016-12-23	365-333	not yet reported which blocks →	IXICA Communications Inc.	812H	Brampton	—
2016-12-23	365-335	not yet reported which blocks →	IXICA Communications Inc.	812H	Caledon East	—
2016-12-23	365-465	not yet reported which blocks →	IXICA Communications Inc.	812H	Cooksville	—
2016-12-23	365-565	not yet reported which blocks →	IXICA Communications Inc.	812H	Streetsville	—
2016-12-23	365-665	not yet reported which blocks →	IXICA Communications Inc.	812H	Malton	—
2016-12-23	365-765	not yet reported which blocks →	IXICA Communications Inc.	812H	Clarkson	—
2016-12-23	365-865	not yet reported which blocks →	IXICA Communications Inc.	812H	Port Credit	—
2016-12-23	365-965	not yet reported which blocks →	IXICA Communications Inc.	812H	Snelgrove	—
2016-12-23	470-882	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA NW	GA
2016-12-23	506-406	not yet reported which blocks →	Iristel Inc.	154E	Fredericton	—
2016-12-23	506-606	not yet reported which blocks →	Iristel Inc.	154E	Fredericton	—
2016-12-23	581-405	not yet reported which blocks →	IVIC Telecom s.e.n.c	817D	La Guadeloupe	—
2016-12-23	605-453	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD	6569	MILLER	SD
2016-12-23	626-777	0–9 XXXwhole prefix which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	ARCADIA	CA
2016-12-22	210-676	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	SANANTONIO	TX
2016-12-22	507-500	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	CALEDONIA	MN
2016-12-22	585-448	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ROCHESTER	NY
2016-12-22	614-964	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7836	WESTERVL	OH
2016-12-22	786-918	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	MIAMI	FL
2016-12-22	812-921	0–9 XXXall 10 · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GEORGETOWN	IN
2016-12-22	812-980	0–9 XXXall 10 · 2 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GALENA	IN
2016-12-22	870-999	0XXX9XXX · 2 holders which blocks →	WINDSTREAM ARKANSAS, INC.	1691	CROSSETT	AR
2016-12-21	206-712	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	SEATTLE	WA
2016-12-21	228-256	0–9 XXXall 10 · 3 holders which blocks →	TELNYX LLC	073H	GULFPORT	MS
2016-12-21	307-475	1XXX3XXX6XXX7XXX8XXX · 2 holders which blocks →	TELNYX LLC	073H	CHEYENNE	WY
2016-12-21	406-831	0–9 XXXall 10 · 6 holders which blocks →	TELNYX LLC	073H	BILLINGS	MT
2016-12-21	605-305	0–9 XXXall 10 · 8 holders which blocks →	TELNYX LLC	073H	SIOUX FLS	SD
2016-12-21	619-745	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	CHULAVISTA	CA
2016-12-21	769-246	0–9 XXXall 10 · 5 holders which blocks →	TELNYX LLC	073H	JACKSON	MS
2016-12-20	205-860	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AL	6804	TUSCALOOSA	AL
2016-12-20	236-701	not yet reported which blocks →	Iristel Inc.	154E	Midway	—
2016-12-20	236-837	not yet reported which blocks →	Iristel Inc.	154E	Revelstoke	—
2016-12-20	346-413	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SPRING	TX
2016-12-20	431-886	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Melita	—
2016-12-20	431-889	not yet reported which blocks →	Westman Media Cooperative Ltd	120F	Deloraine	—
2016-12-20	478-259	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	MACON	GA
2016-12-20	579-642	not yet reported which blocks →	Videotron Ltd.	8306	Mirabel-Aeroport	—
2016-12-20	720-758	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	DENVER	CO

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.