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
2021-04-28	548-399	not yet reported which blocks →	IXICA Communications Inc.	812H	Emeryville	—
2021-04-28	548-499	not yet reported which blocks →	IXICA Communications Inc.	812H	Woodslee	—
2021-04-28	548-599	not yet reported which blocks →	IXICA Communications Inc.	812H	Wheatley	—
2021-04-28	548-699	not yet reported which blocks →	IXICA Communications Inc.	812H	Pleasant Park	—
2021-04-28	548-799	not yet reported which blocks →	IXICA Communications Inc.	812H	Pelee Island	—
2021-04-28	548-884	not yet reported which blocks →	IXICA Communications Inc.	812H	Maidstone	—
2021-04-28	586-280	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	MT CLEMENS	MI
2021-04-28	636-341	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	FSSCRSTLCY	MO
2021-04-28	715-971	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	WAUSAU	WI
2021-04-28	743-887	1XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	GATEWOOD	NC
2021-04-28	762-298	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - GA	983E	EATONTON	GA
2021-04-28	762-303	0–9 XXXall 10 · 3 holders which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	DAHLONEGA	GA
2021-04-28	762-588	5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	CAVESPRING	GA
2021-04-28	785-517	0–9 XXXall 10 · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	ABILENE	KS
2021-04-28	785-519	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	TELNYX LLC	073H	TOPEKA	KS
2021-04-28	814-974	2XXX3XXX4XXX7XXX · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	HEWITT	PA
2021-04-27	209-801	0–9 XXXall 10 · 5 holders which blocks →	TELNYX LLC	073H	JAMESTOWN	CA
2021-04-27	256-889	0–9 XXXall 10 · 3 holders which blocks →	POWERTEL BIRMINGHAM LICENSES, INC.	7475	ARAB	AL
2021-04-27	405-983	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	TELNYX LLC	073H	PAULS VLY	OK
2021-04-27	475-295	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WATERBURY	CT
2021-04-27	571-507	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - DC	7529	WSNGTNZN17	VA
2021-04-27	605-972	1XXX2XXX3XXX6XXX7XXX8XXX · 2 holders which blocks →	ONVOY, LLC - SD	162G	WESTJASPER	SD
2021-04-27	641-796	0–9 XXXall 10 · 2 holders which blocks →	REASNOR TELEPHONE COMPANY, LLC	739D	REASNOR	IA
2021-04-27	681-401	4XXX6XXX7XXX which blocks →	ONVOY SPECTRUM, LLC	624H	BERKELYSPG	WV
2021-04-27	802-910	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	ONVOY, LLC - VT	451F	BURLINGTON	VT
2021-04-27	857-758	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	BOSTON	MA
2021-04-27	878-230	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	HD CARRIER LLC	321J	PTTSBGZON4	PA
2021-04-26	201-277	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - NJ	637C	HACKENSACK	NJ
2021-04-26	218-602	1XXX2XXX3XXX4XXX9XXX · 2 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	FERGUS FLS	MN
2021-04-26	219-274	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	CROWNPOINT	IN
2021-04-26	229-667	2XXX3XXX5XXX7XXX8XXX · 4 holders which blocks →	FRACTEL, LLC	965H	PITTS	GA
2021-04-26	229-946	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	CORDELE	GA
2021-04-26	234-293	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7443	TWINSBURG	OH
2021-04-26	254-437	0XXX1XXX2XXX3XXX · 2 holders which blocks →	TELNYX LLC	073H	HILLSBORO	TX
2021-04-26	260-282	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ARCOLA	IN
2021-04-26	339-365	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	BRYANTVL	MA
2021-04-26	351-345	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	HUDSON	MA
2021-04-26	351-465	1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks →	FRACTEL, LLC	965H	MANCHESTER	MA
2021-04-26	413-465	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	HATFIELD	MA
2021-04-26	413-699	3XXX9XXX · 2 holders which blocks →	FRACTEL, LLC	965H	W STOCKBDG	MA
2021-04-26	413-946	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	HINSDALE	MA
2021-04-26	435-309	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - UT	871E	GLNCNYONCY	UT
2021-04-26	437-648	not yet reported which blocks →	Bell Mobility	6574	Toronto	—
2021-04-26	440-697	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OH	7443	HILLCREST	OH
2021-04-26	447-257	0XXX1XXX2XXX4XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC	224C	MASON CITY	IL
2021-04-26	447-267	0XXX1XXX2XXX4XXX7XXX9XXX · 5 holders which blocks →	ONVOY, LLC	224C	OAKFORD	IL
2021-04-26	447-274	0XXX1XXX4XXX7XXX9XXX · 5 holders which blocks →	ONVOY, LLC	224C	PETERSBURG	IL
2021-04-26	447-317	0XXX4XXX · 2 holders which blocks →	ONVOY, LLC	224C	SCOTTVILLE	IL
2021-04-26	447-387	0XXX1XXX4XXX6XXX · 4 holders which blocks →	ONVOY, LLC	224C	SULLIVAN	IL
2021-04-26	447-427	0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks →	ONVOY, LLC	224C	TALLULA	IL

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.