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
2019-12-23	579-452	not yet reported which blocks →	Cooptel	818D	St-Simon	—
2019-12-23	579-453	not yet reported which blocks →	Cooptel	818D	Ste-Helene-de-Bagot	—
2019-12-23	605-608	0–9 XXXall 10 · 5 holders which blocks →	HD CARRIER LLC	321J	RAPID CITY	SD
2019-12-23	608-503	1XXX3XXX · 2 holders which blocks →	MCC TELEPHONY OF THE MIDWEST, LLC - WI	983F	CASHTON	WI
2019-12-23	612-416	0–9 XXXall 10 · 2 holders which blocks →	HD CARRIER LLC	321J	TWINCITIES	MN
2019-12-23	646-550	0–9 XXXwhole prefix which blocks →	LTE WIRELESS INC D/B/A LTE WIRELESS - NY	452J	NWYRCYZN01	NY
2019-12-23	647-365	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2019-12-23	647-424	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2019-12-23	647-474	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2019-12-23	647-905	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2019-12-23	661-688	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	BKFD MAIN	CA
2019-12-23	727-472	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - FL	937C	CLEARWATER	FL
2019-12-23	737-273	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TX	903C	AUSTIN	TX
2019-12-23	786-756	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - FL	937C	NORTH DADE	FL
2019-12-23	807-500	not yet reported which blocks →	Iristel Inc.	154E	Marathon	—
2019-12-23	858-235	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	LA JOLLA	CA
2019-12-23	904-944	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - FL	937C	JACKSONVL	FL
2019-12-23	917-451	0–9 XXXall 10 · 4 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	NWYRCYZN01	NY
2019-12-23	917-550	0–9 XXXwhole prefix which blocks →	LTE WIRELESS INC D/B/A LTE WIRELESS - NY	452J	NWYRCYZN01	NY
2019-12-20	231-279	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	BIG RAPIDS	MI
2019-12-20	343-558	not yet reported which blocks →	Fido Solutions Inc.	5643	Ottawa-Hull	—
2019-12-20	548-255	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Kitchener-Waterloo	—
2019-12-20	571-461	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - VA	079F	WSNGTNZN17	VA
2019-12-20	571-496	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - VA	8825	LORTONMTRO	VA
2019-12-20	807-549	not yet reported which blocks →	TBayTel	988H	Jaffray-Melick	—
2019-12-20	816-371	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	LAWSON	MO
2019-12-19	205-885	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	HD CARRIER LLC	321J	ASHVILLE	AL
2019-12-19	208-281	0–9 XXXall 10 · 5 holders which blocks →	MILLENNIUM NETWORKS, LLC - ID	022G	POCATELLO	ID
2019-12-19	216-306	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - OH	001F	CLEVELAND	OH
2019-12-19	217-977	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DANVILLE	IL
2019-12-19	231-600	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	TRAVERSECY	MI
2019-12-19	236-445	not yet reported which blocks →	Bell West Inc.	2933	Lillooet	—
2019-12-19	313-946	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	DETROITZN2	MI
2019-12-19	343-580	not yet reported which blocks →	Videotron Ltd.	383F	Kingston	—
2019-12-19	385-310	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	KAYSVILLE	UT
2019-12-19	417-433	3XXX4XXX9XXX · 3 holders which blocks →	FRACTEL, LLC	965H	WALKER	MO
2019-12-19	480-690	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2019-12-19	520-467	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AZ	630E	TUCSON	AZ
2019-12-19	563-356	0XXX1XXX4XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	CHESTER	IA
2019-12-19	585-565	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC- NY	384C	ROCHESTER	NY
2019-12-19	586-300	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	MT CLEMENS	MI
2019-12-19	586-400	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	ROMEO	MI
2019-12-19	608-812	2XXX3XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ARENA	WI
2019-12-19	623-263	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2019-12-19	647-451	not yet reported which blocks →	Videotron Ltd.	787G	Toronto	—
2019-12-19	651-615	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MN	184D	TWINCITIES	MN
2019-12-19	657-414	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	HUNTITNBCH	CA
2019-12-19	712-842	1XXX5XXX · 2 holders which blocks →	FRACTEL, LLC	965H	RANDOLPH	IA
2019-12-19	816-782	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	KANSASCITY	MO
2019-12-19	825-440	not yet reported which blocks →	Videotron Ltd.	787G	Edmonton	—

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.