Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2022-10-04	520-657	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - AZ	587F	HAYDEN	AZ
2022-10-04	548-384	not yet reported which blocks →	Videotron Ltd.	787G	Kitchener-Waterloo	—
2022-10-04	548-398	not yet reported which blocks →	Bell Mobility	6574	Kitchener-Waterloo	—
2022-10-04	548-435	not yet reported which blocks →	Fibernetics Corporation	464D	Beachville	—
2022-10-04	548-436	not yet reported which blocks →	Fibernetics Corporation	464D	Bright	—
2022-10-04	562-581	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LAKEWOOD	CA
2022-10-04	571-582	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - VA	138E	LORTONMTRO	VA
2022-10-04	572-206	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	OKLA CITY	OK
2022-10-04	602-898	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2022-10-04	623-352	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2022-10-04	651-677	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	HASTINGS	MN
2022-10-04	657-619	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	ORANGE	CA
2022-10-04	662-203	0XXX1XXX2XXX3XXX9XXX · 3 holders which blocks →	NUSO, LLC	732J	IUKA	MS
2022-10-04	681-452	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV	6394	HEDGESVL	WV
2022-10-04	771-216	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC	6402	WSHNGTNZN1	DC
2022-10-04	816-816	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MO	093F	KANSASCITY	MO
2022-10-04	858-326	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CA	981E	CHULAVISTA	CA
2022-10-04	947-256	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILFDWH LK	MI
2022-10-04	959-249	0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CT	199F	CANAAN	CT
2022-10-03	212-718	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN01	NY
2022-10-03	212-917	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN01	NY
2022-10-03	220-238	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH	6025	PATASKALA	OH
2022-10-03	224-490	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ARLIGTNHTS	IL
2022-10-03	225-497	0–9 XXXall 10 · 4 holders which blocks →	VOICESTREAM GSM I, LLC	150C	BATONROUGE	LA
2022-10-03	253-402	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	AUBURN	WA
2022-10-03	279-228	0–9 XXXall 10 · 4 holders which blocks →	RACE TELECOMMUNICATIONS, INC. - CA	973E	SCRM MAIN	CA
2022-10-03	309-917	0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks →	NUSO, LLC	732J	PEORIA	IL
2022-10-03	315-518	0–9 XXXall 10 · 3 holders which blocks →	PEERING HUB, INC. - NY	818H	SYRACUSE	NY
2022-10-03	346-594	0–9 XXXall 10 · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	BARKER	TX
2022-10-03	347-212	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN14	NY
2022-10-03	347-347	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	NWYRCYZN14	NY
2022-10-03	347-516	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN03	NY
2022-10-03	416-584	not yet reported which blocks →	IXICA Communications Inc.	812H	Toronto	—
2022-10-03	447-240	0XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LA HARPE	IL
2022-10-03	458-290	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR	5820	KLAMATHFLS	OR
2022-10-03	501-528	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR	6805	MALVERN	AR
2022-10-03	509-296	0XXX1XXX2XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	PULLMAN	WA
2022-10-03	530-874	0XXX1XXX2XXX7XXX · 4 holders which blocks →	RACE TELECOMMUNICATIONS, INC. - CA	973E	WILLIAMS	CA
2022-10-03	530-920	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	RACE TELECOMMUNICATIONS, INC. - CA	973E	GRVY MAIN	CA
2022-10-03	564-235	3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BUCKLEY	WA
2022-10-03	564-262	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	LONGVIEW	WA
2022-10-03	585-649	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NY	997E	ROCHESTER	NY
2022-10-03	613-468	not yet reported which blocks →	IXICA Communications Inc.	812H	Ottawa-Hull	—
2022-10-03	615-706	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	CARTHAGE	TN
2022-10-03	629-281	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN	6673	NASHVILLE	TN
2022-10-03	669-324	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CAMPBELL	CA
2022-10-03	672-338	not yet reported which blocks →	Fido Solutions Inc.	5643	Vancouver	—
2022-10-03	672-558	not yet reported which blocks →	Fido Solutions Inc.	5643	Vancouver	—
2022-10-03	672-833	not yet reported which blocks →	Fido Solutions Inc.	5643	Vancouver	—
2022-10-03	672-855	not yet reported which blocks →	Fido Solutions Inc.	5643	Vancouver	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.