Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 21

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
2014-10-01	438-351	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-10-01	438-352	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-10-01	438-353	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-10-01	438-354	not yet reported which blocks →	TELUS Mobility	8303	Montreal	—
2014-10-01	438-666	not yet reported which blocks →	InnSysVoice Corp	383H	Montreal	—
2014-10-01	470-505	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	CUMMING	GA
2014-10-01	480-787	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - AZ	3285	PHOENIX	AZ
2014-10-01	540-739	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	BLACKSBURG	VA
2014-10-01	551-232	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	BAYONNE	NJ
2014-10-01	551-233	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NJ	4804	JERSEYCITY	NJ
2014-10-01	580-454	not yet reported which blocks →	WICHITA ONLINE, INC. - OK	258F	ELGIN	OK
2014-10-01	580-598	not yet reported which blocks →	WICHITA ONLINE, INC. - OK	258F	FLETCHER	OK
2014-10-01	580-717	not yet reported which blocks →	WICHITA ONLINE, INC. - OK	258F	ROOSEVELT	OK
2014-10-01	580-957	not yet reported which blocks →	WICHITA ONLINE, INC. - OK	258F	CYRIL	OK
2014-10-01	580-966	not yet reported which blocks →	WICHITA ONLINE, INC. - OK	258F	MT VIEW	OK
2014-10-01	616-239	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ZEELAND	MI
2014-10-01	628-400	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	SNFC CNTRL	CA
2014-10-01	628-600	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	SNFC CNTRL	CA
2014-10-01	628-800	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CA	649C	SNFC CNTRL	CA
2014-10-01	657-239	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BUENA PARK	CA
2014-10-01	762-302	4XXX5XXX8XXX9XXX · 3 holders which blocks →	ETC COMMUNICATIONS, L.L.C. - GA	205D	EASTANOLLE	GA
2014-10-01	857-330	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2014-10-01	858-257	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	LA JOLLA	CA
2014-10-01	860-931	0–9 XXXall 10 · 7 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - CT	6624	WILLIMNTIC	CT
2014-10-01	873-394	not yet reported which blocks →	TELUS Quebec	2243	Ville-Marie	—
2014-10-01	916-547	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	RSVL CTHT	CA
2014-10-01	937-929	0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BEAVERCREK	OH
2014-10-01	971-720	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SALEM	OR
2014-10-01	971-915	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - OR	3234	SALEM	OR
2014-09-30	209-284	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	MODESTO	CA
2014-09-30	215-845	0–9 XXXall 10 · 7 holders which blocks →	WIDE VOICE, LLC - PA	218H	PHLDLPHZN1	PA
2014-09-30	308-833	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GRAND IS	NE
2014-09-30	407-775	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	WINTERPARK	FL
2014-09-30	424-373	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	CMTN CMTN	CA
2014-09-30	425-559	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	BELLEVUE	WA
2014-09-30	484-370	0–9 XXXall 10 · 8 holders which blocks →	COMCAST IP PHONE, LLC	318J	PHPHSBZN30	PA
2014-09-30	506-270	not yet reported which blocks →	Comwave Networks	160G	Grand Bay-Westfield	—
2014-09-30	561-609	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	BOCA RATON	FL
2014-09-30	561-612	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	WPALMBEACH	FL
2014-09-30	562-341	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	ALAMITOS	CA
2014-09-30	567-601	0–9 XXXall 10 · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - OH	7532	ARLINGTON	OH
2014-09-30	603-308	0–9 XXXwhole prefix which blocks →	CONSOLIDATED COMM OF NO. NEW ENGLAND-NH	5113	HANOVER	NH
2014-09-30	628-444	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CA	649C	SNFC CNTRL	CA
2014-09-30	631-746	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	AMITYVILLE	NY
2014-09-30	639-379	not yet reported which blocks →	SaskTel Mobility	9868	Elrose	—
2014-09-30	646-892	0–9 XXXall 10 · 5 holders which blocks →	MATRIX TELECOM, LLC. S/I/I TNCI - NY	942B	NWYRCYZN01	NY
2014-09-30	650-772	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	MT VIEW	CA
2014-09-30	720-662	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	DENVER	CO
2014-09-30	720-757	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	DENVER	CO
2014-09-30	720-770	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	DECKERS	CO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.