Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

NEW CINGULAR WIRELESS PCS, LLC - DC 26

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
2011-10-17	443-401	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BALTIMORE	MD
2011-10-17	469-251	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2011-10-17	581-208	not yet reported which blocks →	IVIC Telecom s.e.n.c	817D	St-Ferdinand-D'Halifax	—
2011-10-17	581-209	not yet reported which blocks →	IVIC Telecom s.e.n.c	817D	Disraeli	—
2011-10-17	681-313	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	CHRLSTNZN1	WV
2011-10-17	705-304	not yet reported which blocks →	Iristel Inc.	154E	Peterborough	—
2011-10-17	903-202	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - TX	903C	WHITEHOUSE	TX
2011-10-17	918-264	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	TULSA	OK
2011-10-14	201-479	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF NEW JERSEY, LLC - NJ	264F	JERSEYCITY	NJ
2011-10-14	201-509	0–9 XXXall 10 · 5 holders which blocks →	CSC VOICE, LLC	612K	FAIR LAWN	NJ
2011-10-14	219-203	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	WHEELER	IN
2011-10-14	226-630	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Jarvis	—
2011-10-14	289-735	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Ancaster	—
2011-10-14	289-736	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Cayuga	—
2011-10-14	289-737	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Dundas	—
2011-10-14	289-738	not yet reported which blocks →	Rogers Communications Canada Inc. (Cable)	743B	Dunnville	—
2011-10-14	404-796	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2011-10-14	404-922	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA	GA
2011-10-14	470-248	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	GAINESVL	GA
2011-10-14	470-313	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ADAIRSVL	GA
2011-10-14	470-865	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA	6540	ATLANTA NE	GA
2011-10-14	480-685	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2011-10-14	501-264	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	LITTLEROCK	AR
2011-10-14	504-206	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	NEWORLEANS	LA
2011-10-14	504-229	0–9 XXXall 10 · 5 holders which blocks →	VOICESTREAM GSM I, LLC	150C	KENNER	LA
2011-10-14	587-701	not yet reported which blocks →	Zayo Canada Inc.	8304	Edmonton	—
2011-10-14	587-702	not yet reported which blocks →	Zayo Canada Inc.	8304	Calgary	—
2011-10-14	681-245	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	CHRLSTNZN1	WV
2011-10-14	778-442	not yet reported which blocks →	Shaw Telecom Inc.	497E	Armstrong	—
2011-10-14	778-443	not yet reported which blocks →	Shaw Telecom Inc.	497E	Enderby	—
2011-10-14	832-562	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	SPRING	TX
2011-10-14	845-275	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	NEWBURGH	NY
2011-10-14	910-889	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	ATKINSON	NC
2011-10-13	205-703	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	BIRMINGHAM	AL
2011-10-13	779-203	8XXX9XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IL	6115	ROCKFORD	IL
2011-10-13	917-525	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN15	NY
2011-10-13	917-746	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	NWYRCYZN01	NY
2011-10-12	331-203	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	AURORA	IL
2011-10-12	331-206	0XXX1XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	AURORA	IL
2011-10-12	567-301	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	FINDLAY	OH
2011-10-12	705-274	not yet reported which blocks →	TELUS Mobility	8303	Timmins	—
2011-10-12	708-208	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	LA GRANGE	IL
2011-10-12	708-504	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	LA GRANGE	IL
2011-10-12	902-812	not yet reported which blocks →	Iristel Inc.	154E	Charlottetown	—
2011-10-11	267-521	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS ENTERPRISES, LP	6626	PHLDLPHZN2	PA
2011-10-11	289-786	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	St. Catharines-Thorold	—
2011-10-11	313-338	0–9 XXXall 10 · 4 holders which blocks →	MICHIGAN BELL TEL CO	9323	DETROITZN1	MI
2011-10-11	438-896	not yet reported which blocks →	Distributel	083E	Montreal	—
2011-10-11	443-214	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ANNAPOLIS	MD
2011-10-11	479-219	0–9 XXXall 10 · 5 holders which blocks →	CSC VOICE, LLC	612K	RUSSELLVL	AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.