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
2014-07-03	509-367	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	YAKIMA	WA
2014-07-03	512-640	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - TX	6114	AUSTIN	TX
2014-07-03	587-474	not yet reported which blocks →	TELUS	8084	Beaumont	—
2014-07-03	636-249	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	UNION	MO
2014-07-03	636-306	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	HERCUMPVLY	MO
2014-07-03	636-383	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	TROY	MO
2014-07-03	647-452	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2014-07-03	720-577	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	DENVER	CO
2014-07-03	804-324	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	PETERSBURG	VA
2014-07-03	816-499	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	KANSASCITY	MO
2014-07-03	901-567	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	MEMPHIS	TN
2014-07-03	913-265	0–9 XXXall 10 · 3 holders which blocks →	METROPCS, INC.	5562	KANSASCITY	KS
2014-07-02	219-231	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	PORTAGE	IN
2014-07-02	219-243	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	MICHIGANCY	IN
2014-07-02	226-399	not yet reported which blocks →	Distributel	082E	Kitchener-Waterloo	—
2014-07-02	226-599	not yet reported which blocks →	Distributel	082E	London	—
2014-07-02	256-826	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	SHEFFIELD	AL
2014-07-02	512-643	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	AUSTIN	TX
2014-07-02	581-925	not yet reported which blocks →	Distributel	083E	Quebec	—
2014-07-02	813-327	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	TAMPACEN	FL
2014-07-02	832-756	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	SATSUMA	TX
2014-07-01	224-268	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	ELGIN	IL
2014-07-01	312-248	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	CHICGOZN01	IL
2014-07-01	315-930	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	SYRACUSE	NY
2014-07-01	551-228	0–9 XXXall 10 · 6 holders which blocks →	CABLEVISION LIGHTPATH, INC. - NJ	4948	HACKENSACK	NJ
2014-07-01	571-351	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	WSNGTNZN08	VA
2014-07-01	586-213	0XXX1XXX2XXX3XXX5XXX8XXX9XXX · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	MT CLEMENS	MI
2014-07-01	607-930	0XXX1XXX3XXX4XXX7XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NY	4006	BINGHAMTON	NY
2014-07-01	609-582	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ALLENTOWN	NJ
2014-07-01	716-970	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY	6959	BUFFALO	NY
2014-07-01	779-227	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	JOLIET	IL
2014-07-01	804-629	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA	6827	RICHMOND	VA
2014-07-01	808-786	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HONOLULU	HI
2014-07-01	808-787	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	HONOLULU	HI
2014-07-01	832-927	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL	9533	HOUSTON	TX
2014-07-01	872-242	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	CHICGOZN04	IL
2014-06-30	210-574	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	SANANTONIO	TX
2014-06-30	402-900	0XXX3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NE	3233	PAWNEECITY	NE
2014-06-30	402-907	0–9 XXXall 10 · 8 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	HUMBOLDT	NE
2014-06-30	469-284	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 OF TELECOM OF TEXAS, LLC - TX	7516	IRVING	TX
2014-06-30	512-679	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	AUSTIN	TX
2014-06-30	530-768	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	REDDING	CA
2014-06-30	602-483	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF ARIZONA, LLC - AZ	579F	PHOENIX	AZ
2014-06-30	669-237	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	CAMPBELL	CA
2014-06-30	720-416	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	DENVER	CO
2014-06-30	804-309	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA	7238	RICHMOND	VA
2014-06-30	812-997	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 TELECOM OF INDIANA, LP - IN	7060	GALENA	IN
2014-06-30	828-415	0–9 XXXall 10 · 5 holders which blocks →	ETC COMMUNICATIONS, LLC - NC	403H	HAYESVILLE	NC
2014-06-30	956-296	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL	9533	BROWNSVL	TX
2014-06-27	208-218	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	BRUNEAU	ID

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.