Recent prefix assignments

352 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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
2011-10-04	438-933	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2011-10-04	470-212	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - GA	8392	ATLANTA NE	GA
2011-10-04	539-573	0–9 XXXall 10 · 3 holders which blocks →	SOUTHWESTERN BELL	9533	TULSA	OK
2011-10-04	581-703	not yet reported which blocks →	Iristel Inc.	154E	Quebec	—
2011-10-04	623-282	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PHOENIX	AZ
2011-10-04	647-667	not yet reported which blocks →	Videotron Ltd.	383F	Toronto	—
2011-10-04	647-766	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2011-10-04	647-907	not yet reported which blocks →	Videotron Ltd.	383F	Toronto	—
2011-10-04	708-666	0–9 XXXall 10 · 6 holders which blocks →	CLEAR RATE COMMUNICATIONS, LLC	046L	OAK PARK	IL
2011-10-04	720-414	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	ALLNSPKLYN	CO
2011-10-04	807-619	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Thunder Bay	—
2011-10-03	207-248	0–9 XXXall 10 · 6 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	AUGUSTA	ME
2011-10-03	314-296	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MO	4932	ST LOUIS	MO
2011-10-03	406-302	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MT	453F	WOLF CREEK	MT
2011-10-03	406-812	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MT	453F	LAUREL	MT
2011-10-03	406-905	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MT	453F	JOLIET	MT
2011-10-03	458-200	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - OR	7531	CASCADELKS	OR
2011-10-03	541-200	0–9 XXXall 10 · 7 holders which blocks →	HUNTER CONSTRUCTION, INC. DBA HUNTER COMMS - OR	660C	MEDFORD	OR
2011-10-03	708-340	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	LA GRANGE	IL
2011-10-03	857-213	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	BOSTON	MA
2011-09-30	410-220	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	ELKRIDGE	MD
2011-09-30	410-844	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF MARYLAND, LLC	568G	BALTIMORE	MD
2011-09-30	443-210	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	SALISBURY	MD
2011-09-30	450-866	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Jacques	—
2011-09-30	450-870	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Michel-des-Saints	—
2011-09-30	587-360	not yet reported which blocks →	Shaw Telecom Inc.	497E	Airdrie	—
2011-09-30	587-361	not yet reported which blocks →	Shaw Telecom Inc.	497E	Canmore	—
2011-09-30	587-362	not yet reported which blocks →	Shaw Telecom Inc.	497E	Cochrane	—
2011-09-30	587-363	not yet reported which blocks →	Shaw Telecom Inc.	497E	High River	—
2011-09-30	587-364	not yet reported which blocks →	Shaw Telecom Inc.	497E	Okotoks	—
2011-09-30	587-365	not yet reported which blocks →	Shaw Telecom Inc.	497E	Strathmore	—
2011-09-30	604-281	not yet reported which blocks →	Shaw Telecom Inc.	497E	West Vancouver	—
2011-09-30	604-370	not yet reported which blocks →	Shaw Telecom Inc.	497E	Richmond	—
2011-09-30	604-474	not yet reported which blocks →	Shaw Telecom Inc.	497E	Port Coquitlam	—
2011-09-30	604-492	not yet reported which blocks →	Shaw Telecom Inc.	497E	Port Moody	—
2011-09-30	604-498	not yet reported which blocks →	Shaw Telecom Inc.	497E	Whalley	—
2011-09-30	604-503	not yet reported which blocks →	Shaw Telecom Inc.	497E	Newton	—
2011-09-30	604-553	not yet reported which blocks →	Shaw Telecom Inc.	497E	New Westminster	—
2011-09-30	604-770	not yet reported which blocks →	Shaw Telecom Inc.	497E	North Vancouver	—
2011-09-30	631-330	0–9 XXXwhole prefix which blocks →	CABLEVISION LIGHTPATH, INC. - NY	7126	FARMINGDL	NY
2011-09-30	717-693	0–9 XXXall 10 · 3 holders which blocks →	D&E/OMNIPOINT WIREL JOINT VENT LP DBA PCS ONE	6846	COLUMBIA	PA
2011-09-30	778-351	not yet reported which blocks →	Shaw Telecom Inc.	497E	Saanich	—
2011-09-30	778-352	not yet reported which blocks →	Shaw Telecom Inc.	497E	Sooke	—
2011-09-30	859-443	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	COVINGTON	KY
2011-09-30	909-343	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	ARROWHEAD	CA
2011-09-29	727-202	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF FLORIDA, LLC - FL	902E	STPETERSBG	FL
2011-09-29	816-615	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	RICHMOND	MO
2011-09-29	940-216	not yet reported which blocks →	WEB FIRE COMMUNICATIONS, INC. - TX	2985	JACKSBORO	TX
2011-09-28	201-419	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	RAMSEY	NJ
2011-09-28	248-826	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	NORTHVILLE	MI

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.