Recent prefix assignments

349 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
2011-08-04	601-401	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MS	992E	FLORA	MS
2011-08-04	848-223	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	TOMS RIVER	NJ
2011-08-04	919-891	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NC	998E	PRINCETON	NC
2011-08-03	226-936	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Leamington	—
2011-08-03	226-970	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Tillsonburg	—
2011-08-03	228-200	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	HURLEY	MS
2011-08-03	270-935	0–9 XXXall 10 · 4 holders which blocks →	BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL	9419	BOWLNGGREN	KY
2011-08-03	604-239	not yet reported which blocks →	Iristel Inc.	154E	New Westminster	—
2011-08-03	613-504	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Pembroke	—
2011-08-03	613-701	not yet reported which blocks →	Iristel Inc.	154E	Ottawa-Hull	—
2011-08-03	705-433	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Midland	—
2011-08-03	843-593	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - SC	077F	BEAUFORT	SC
2011-08-03	931-253	0–9 XXXall 10 · 6 holders which blocks →	TENNESSEE TEL. CO.	0575	WAYNESBORO	TN
2011-08-03	985-275	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SOUTHOSYKA	LA
2011-08-02	225-447	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	BATONROUGE	LA
2011-08-02	253-448	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	TACOMA	WA
2011-08-02	312-448	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	CHICGOZN01	IL
2011-08-02	312-459	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	CHICGOZN01	IL
2011-08-02	501-444	0XXX1XXX2XXX4XXX5XXX8XXX9XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	LITTLEROCK	AR
2011-08-02	681-340	0–9 XXXall 10 · 3 holders which blocks →	FRONTIER WEST VIRGINIA INC.	9214	CHRLSTNZN1	WV
2011-08-02	857-368	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	BOSTON	MA
2011-08-01	385-319	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	KAYSVILLE	UT
2011-08-01	408-767	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	GILROY	CA
2011-08-01	707-532	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	LOLETA	CA
2011-08-01	713-239	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	HOUSTON	TX
2011-07-29	225-349	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BATONROUGE	LA
2011-07-29	225-421	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BATONROUGE	LA
2011-07-29	281-908	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUSTON	TX
2011-07-29	281-928	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUSTON	TX
2011-07-29	408-477	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SNJS WEST	CA
2011-07-29	408-498	0–9 XXXall 10 · 8 holders which blocks →	COMCAST PHONE OF CALIFORNIA, LLC	394L	SUNNYVALE	CA
2011-07-29	541-615	0–9 XXXall 10 · 4 holders which blocks →	WARM SPRINGS TELECOMMUNICATIONS COMPANY - OR	094G	MADRAS	OR
2011-07-29	612-224	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 TELECOM OF MINNESOTA, LLC - MN	5312	TWINCITIES	MN
2011-07-29	803-299	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC	8534	COLUMBIA	SC
2011-07-29	832-564	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOUSTON	TX
2011-07-28	225-250	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BATONROUGE	LA
2011-07-28	404-850	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - GA	983E	ATLANTA	GA
2011-07-28	438-804	not yet reported which blocks →	Iristel Inc.	154E	Montreal	—
2011-07-28	438-805	not yet reported which blocks →	Iristel Inc.	154E	Montreal	—
2011-07-28	440-222	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	LORAIN	OH
2011-07-28	469-242	0–9 XXXall 10 · 5 holders which blocks →	PAETEC ITEL, LLC	829J	IRVING	TX
2011-07-28	530-762	0–9 XXXall 10 · 7 holders which blocks →	AT&T ENTERPRISES, LLC	516C	PARADISE	CA
2011-07-28	581-777	not yet reported which blocks →	Fido Solutions Inc.	5643	Quebec	—
2011-07-28	604-621	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Abbotsford	—
2011-07-28	816-787	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KANSASCITY	MO
2011-07-28	816-832	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KANSASCITY	MO
2011-07-28	816-982	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	KANSASCITY	MO
2011-07-28	819-223	not yet reported which blocks →	Videotron Ltd.	8306	Asbestos	—
2011-07-28	956-250	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EDINBURG	TX
2011-07-28	972-810	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	CARROLLTON	TX

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.