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
2020-08-18	672-876	not yet reported which blocks →	Fibernetics Corporation	464D	Whalley	—
2020-08-18	672-877	not yet reported which blocks →	Fibernetics Corporation	464D	Port Moody	—
2020-08-18	672-878	not yet reported which blocks →	Fibernetics Corporation	464D	Newton	—
2020-08-18	672-879	not yet reported which blocks →	Fibernetics Corporation	464D	Langley	—
2020-08-18	672-880	not yet reported which blocks →	Fibernetics Corporation	464D	Haney	—
2020-08-18	672-881	not yet reported which blocks →	Fibernetics Corporation	464D	Cloverdale	—
2020-08-18	680-778	0XXX1XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	METROPCS, INC.	5562	ROME	NY
2020-08-18	719-517	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	COLORDOSPG	CO
2020-08-18	720-790	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CO	026D	ALLNSPKLYN	CO
2020-08-18	737-336	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	AUSTIN	TX
2020-08-18	754-254	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	CORAL SPG	FL
2020-08-18	856-436	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - NJ	118F	HADDON HTS	NJ
2020-08-18	862-895	0–9 XXXall 10 · 3 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	NEWARK	NJ
2020-08-18	901-549	0–9 XXXall 10 · 2 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	MEMPHIS	TN
2020-08-18	903-788	0XXX1XXX3XXX4XXX6XXX9XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	ROANE	TX
2020-08-18	949-406	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	IRVINE	CA
2020-08-18	949-621	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	IRVINE	CA
2020-08-18	979-336	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	ANGLETON	TX
2020-08-17	229-341	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	VALDOSTA	GA
2020-08-17	272-245	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA	6392	POTTSVILLE	PA
2020-08-17	307-302	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WY	081F	CODY	WY
2020-08-17	308-800	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	NO JULESBG	NE
2020-08-17	313-678	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	DETROITZN2	MI
2020-08-17	509-510	0–9 XXXall 10 · 4 holders which blocks →	COMPUTERS 5*, INC. DBA LOCALTEL - WA	3229	OTHELLO	WA
2020-08-17	509-519	1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 2 holders which blocks →	COMPUTERS 5*, INC. DBA LOCALTEL - WA	3229	MATTAWA	WA
2020-08-17	531-900	0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 6 holders which blocks →	FRACTEL, LLC	965H	WEST POINT	NE
2020-08-17	571-895	0–9 XXXall 10 · 3 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	WSNGTNZN08	VA
2020-08-17	579-385	not yet reported which blocks →	ISP Telecom Inc.	4727	Bromont	—
2020-08-17	579-386	not yet reported which blocks →	ISP Telecom Inc.	4727	Dunham	—
2020-08-17	579-387	not yet reported which blocks →	ISP Telecom Inc.	4727	Knowlton	—
2020-08-17	579-388	not yet reported which blocks →	ISP Telecom Inc.	4727	Sutton	—
2020-08-17	579-389	not yet reported which blocks →	ISP Telecom Inc.	4727	Ste-Julienne	—
2020-08-17	579-390	not yet reported which blocks →	ISP Telecom Inc.	4727	Oka	—
2020-08-17	579-391	not yet reported which blocks →	ISP Telecom Inc.	4727	Pierreville	—
2020-08-17	581-615	not yet reported which blocks →	ISP Telecom Inc.	4727	Boischatel	—
2020-08-17	581-616	not yet reported which blocks →	ISP Telecom Inc.	4727	Loretteville	—
2020-08-17	581-617	not yet reported which blocks →	ISP Telecom Inc.	4727	Notre-Dame-des-Laurentides	—
2020-08-17	581-618	not yet reported which blocks →	ISP Telecom Inc.	4727	St-Fereol	—
2020-08-17	581-619	not yet reported which blocks →	ISP Telecom Inc.	4727	Ste-Anne-de-Beaupre	—
2020-08-17	636-201	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WARRENTON	MO
2020-08-17	639-551	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Moose Jaw	—
2020-08-17	639-552	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Moose Jaw	—
2020-08-17	681-286	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HNTNGTNZN1	WV
2020-08-17	720-615	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	KEENESBURG	CO
2020-08-17	720-752	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	DENVER	CO
2020-08-17	743-218	0–9 XXXall 10 · 8 holders which blocks →	METROPCS, INC.	5562	GIBSONVL	NC
2020-08-17	810-254	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	GRANDBLANC	MI
2020-08-17	947-226	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	AUBURN HTS	MI
2020-08-17	980-334	0–9 XXXall 10 · 5 holders which blocks →	METROPCS, INC.	5562	CONCORD	NC
2020-08-14	202-998	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - DC	850D	WSHNGTNZN1	DC

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.