Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 28

ONVOY, LLC - CA 26

NEW CINGULAR WIRELESS PCS, LLC - IL 25

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12

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
2013-06-24	513-472	0–9 XXXall 10 · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MORROW	OH
2013-06-24	513-491	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	NEWTONSVL	OH
2013-06-24	714-592	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BREA	CA
2013-06-24	819-512	not yet reported which blocks →	Comwave Networks	160G	St-Felix-de-Kingsey	—
2013-06-24	819-590	not yet reported which blocks →	Comwave Networks	160G	Danville	—
2013-06-24	819-910	not yet reported which blocks →	Comwave Networks	160G	Lac-Megantic	—
2013-06-24	819-912	not yet reported which blocks →	Comwave Networks	160G	Richmond	—
2013-06-24	819-969	not yet reported which blocks →	Comwave Networks	160G	Sherbrooke	—
2013-06-24	819-970	not yet reported which blocks →	Comwave Networks	160G	South Durham	—
2013-06-24	832-750	0–9 XXXwhole prefix which blocks →	SOUTHWESTERN BELL	9533	HOUSTON	TX
2013-06-24	873-266	not yet reported which blocks →	Comwave Networks	160G	Weedon	—
2013-06-24	917-877	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN09	NY
2013-06-21	210-743	0–9 XXXall 10 · 2 holders which blocks →	PAETEC ITEL, LLC	829J	SANANTONIO	TX
2013-06-21	224-248	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ARLIGTNHTS	IL
2013-06-21	317-653	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IN	4803	INDIANAPLS	IN
2013-06-21	343-268	not yet reported which blocks →	Comwave Networks	160G	Arden	—
2013-06-21	343-269	not yet reported which blocks →	Comwave Networks	160G	Bancroft	—
2013-06-21	343-270	not yet reported which blocks →	Comwave Networks	160G	Belleville	—
2013-06-21	343-271	not yet reported which blocks →	Comwave Networks	160G	Brighton	—
2013-06-21	423-491	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	JOHNSON CY	TN
2013-06-21	443-410	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GLENBURNIE	MD
2013-06-21	450-351	not yet reported which blocks →	Comwave Networks	160G	Beauharnois	—
2013-06-21	450-353	not yet reported which blocks →	Comwave Networks	160G	Howick	—
2013-06-21	450-364	not yet reported which blocks →	Comwave Networks	160G	St-Chrysostome	—
2013-06-21	450-387	not yet reported which blocks →	Comwave Networks	160G	St-Constant	—
2013-06-21	450-481	not yet reported which blocks →	Comwave Networks	160G	St-Remi	—
2013-06-21	540-970	0–9 XXXall 10 · 6 holders which blocks →	CITIZENS TELEPHONE COOPERATIVE - VA	544A	ROANOKE	VA
2013-06-21	579-288	not yet reported which blocks →	Comwave Networks	160G	Chateauguay	—
2013-06-21	612-352	0–9 XXXall 10 · 4 holders which blocks →	QWEST CORPORATION	9631	TWINCITIES	MN
2013-06-21	616-368	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLLAND	MI
2013-06-21	786-483	0–9 XXXall 10 · 3 holders which blocks →	PAETEC ITEL, LLC	829J	MIAMI	FL
2013-06-21	803-470	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - SC	077F	COLUMBIA	SC
2013-06-21	916-540	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	RSVL MAIN	CA
2013-06-21	980-352	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NC	998E	LOWELL	NC
2013-06-20	343-265	not yet reported which blocks →	Comwave Networks	160G	Deseronto	—
2013-06-20	343-266	not yet reported which blocks →	Comwave Networks	160G	Kingston	—
2013-06-20	343-267	not yet reported which blocks →	Comwave Networks	160G	Napanee	—
2013-06-20	343-272	not yet reported which blocks →	Comwave Networks	160G	Northbrook	—
2013-06-20	343-273	not yet reported which blocks →	Comwave Networks	160G	Plevna	—
2013-06-20	469-416	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-06-20	469-418	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	GRANDPRARI	TX
2013-06-20	484-273	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - PA	7434	ALLENTOWN	PA
2013-06-20	484-862	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ALLENTOWN	PA
2013-06-20	512-375	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	AUSTIN	TX
2013-06-20	605-968	7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SD	6569	HURON	SD
2013-06-20	647-483	not yet reported which blocks →	ISP Telecom Inc.	4727	Toronto	—
2013-06-20	786-801	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - FL	4802	MIAMI	FL
2013-06-20	786-803	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	MIAMI	FL
2013-06-20	807-861	not yet reported which blocks →	Bell Mobility	6574	Fort Frances	—
2013-06-20	902-599	not yet reported which blocks →	Bell Mobility Aliant	329A	Kentville	—

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.