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
2019-10-15	438-377	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2019-10-15	438-378	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2019-10-15	438-379	not yet reported which blocks →	Videotron Ltd.	328F	Montreal	—
2019-10-15	479-371	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AR	802C	BENTONVL	AR
2019-10-15	479-374	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AR	802C	BENTONVL	AR
2019-10-15	479-375	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - AR	802C	BENTONVL	AR
2019-10-15	514-474	not yet reported which blocks →	IXICA Communications Inc.	812H	Montreal	—
2019-10-15	607-314	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CSC WIRELESS, LLC	425J	BINGHAMTON	NY
2019-10-15	651-390	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	VONAGE AMERICA LLC	197D	STILLWATER	MN
2019-10-15	667-346	0XXX2XXX3XXX6XXX7XXX9XXX · 4 holders which blocks →	CSC WIRELESS, LLC	425J	SALISBURY	MD
2019-10-15	689-213	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	KISSIMMEE	FL
2019-10-15	917-540	0–9 XXXwhole prefix which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN01	NY
2019-10-15	920-990	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - WI	225C	RIPON	WI
2019-10-15	929-532	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN03	NY
2019-10-15	929-544	0–9 XXXall 10 · 2 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN08	NY
2019-10-15	929-557	0–9 XXXall 10 · 5 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN10	NY
2019-10-15	929-604	0–9 XXXall 10 · 7 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NY	6622	NWYRCYZN13	NY
2019-10-14	224-362	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	FRACTEL, LLC	965H	ZION	IL
2019-10-14	251-512	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - AL	604E	COFFEEVL	AL
2019-10-14	251-850	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - AL	604E	FAIRHOPE	AL
2019-10-14	501-382	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AR	348F	LONSDALE	AR
2019-10-14	659-529	0–9 XXXall 10 · 7 holders which blocks →	FRACTEL, LLC	965H	BESSEMER	AL
2019-10-14	659-766	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	COLUMBIANA	AL
2019-10-11	205-922	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	BIRMINGHAM	AL
2019-10-11	223-225	0–9 XXXall 10 · 5 holders which blocks →	CSC WIRELESS, LLC	425J	HARISBGZN1	PA
2019-10-11	224-342	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	ARLIGTNHTS	IL
2019-10-11	224-367	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	FRACTEL, LLC	965H	DUNDEE	IL
2019-10-11	224-488	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	GLENVIEW	IL
2019-10-11	224-842	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	LIBERTYVL	IL
2019-10-11	226-906	not yet reported which blocks →	Iristel Inc.	154E	Essex	—
2019-10-11	226-907	not yet reported which blocks →	Iristel Inc.	154E	Durham	—
2019-10-11	249-801	not yet reported which blocks →	Iristel Inc.	154E	Algoma Mills	—
2019-10-11	279-202	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	FAIR OAKS	CA
2019-10-11	331-336	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	AURORA	IL
2019-10-11	331-348	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	ELBURN	IL
2019-10-11	331-732	0–9 XXXall 10 · 2 holders which blocks →	FRACTEL, LLC	965H	GENEVA	IL
2019-10-11	367-998	not yet reported which blocks →	TELUS Mobility	8303	Alma	—
2019-10-11	469-836	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	GRANDPRARI	TX
2019-10-11	469-934	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2019-10-11	478-887	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - GA	067D	JEFFERSNVL	GA
2019-10-11	479-368	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FAYETTEVL	AR
2019-10-11	518-914	0–9 XXXall 10 · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	SCHENCTADY	NY
2019-10-11	605-640	0–9 XXXall 10 · 5 holders which blocks →	AIRUS, INC. - SD	580H	MCINTOSH	SD
2019-10-11	659-888	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	FRACTEL, LLC	965H	CALERA	AL
2019-10-11	667-274	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELKRIDGE	MD
2019-10-11	680-213	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	HERKIMER	NY
2019-10-11	682-306	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ARLINGTON	TX
2019-10-11	727-296	0–9 XXXall 10 · 4 holders which blocks →	MCI WORLDCOM COMMUNICATIONS, INC. - FL	7448	CLEARWATER	FL
2019-10-11	754-251	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	HOLLYWOOD	FL
2019-10-11	774-416	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	FRAMINGHAM	MA

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.