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
2019-12-27	873-557	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-558	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-577	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-599	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-677	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-778	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-833	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-855	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-877	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-27	873-899	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Ottawa-Hull	—
2019-12-26	608-933	2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks →	FRACTEL, LLC	965H	LYNDON STA	WI
2019-12-24	208-510	0–9 XXXall 10 · 5 holders which blocks →	PROJECT MUTUAL TEL. COOP. ASSN., INC. - ID	3816	BOISE	ID
2019-12-24	209-412	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MODESTO	CA
2019-12-24	236-233	not yet reported which blocks →	Iristel Inc.	154E	Abbotsford	—
2019-12-24	249-209	not yet reported which blocks →	Iristel Inc.	154E	Orillia	—
2019-12-24	314-208	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SAPPINGTON	MO
2019-12-24	332-220	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN01	NY
2019-12-24	346-409	0–9 XXXall 10 · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	HSTNSUBURB	TX
2019-12-24	380-210	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	COLUMBUS	OH
2019-12-24	380-212	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HILLIARD	OH
2019-12-24	412-912	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - PA	547E	PTTSBGZON1	PA
2019-12-24	438-255	not yet reported which blocks →	Iristel Inc.	154E	Pointe-Claire	—
2019-12-24	470-549	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ATLANTA NE	GA
2019-12-24	470-661	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ATLANTA SO	GA
2019-12-24	478-309	0–9 XXXall 10 · 4 holders which blocks →	TELNYX LLC	073H	MACON	GA
2019-12-24	562-476	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ALAMITOS	CA
2019-12-24	662-806	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	HERNANDO	MS
2019-12-24	667-261	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	COLUMBIA	MD
2019-12-24	774-422	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BROCKTON	MA
2019-12-24	804-542	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - VA	7238	MANAKIN	VA
2019-12-24	825-413	not yet reported which blocks →	TELUS	8084	Calgary	—
2019-12-24	825-414	not yet reported which blocks →	TELUS	8084	Calgary	—
2019-12-24	825-415	not yet reported which blocks →	TELUS	8084	Calgary	—
2019-12-24	857-357	0–9 XXXall 10 · 5 holders which blocks →	MEGAPHONE, INC.	007J	CAMBRIDGE	MA
2019-12-24	862-332	0–9 XXXall 10 · 2 holders which blocks →	CSC WIRELESS, LLC	425J	HAWTHORNE	NJ
2019-12-24	914-383	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WSCHSTZN03	NY
2019-12-24	929-475	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NWYRCYZN06	NY
2019-12-24	949-570	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	IRVINE	CA
2019-12-23	346-408	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	DICKINSON	TX
2019-12-23	346-415	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	HSTNSUBURB	TX
2019-12-23	347-540	0–9 XXXwhole prefix which blocks →	LTE WIRELESS INC D/B/A LTE WIRELESS - NY	452J	NWYRCYZN12	NY
2019-12-23	347-550	0–9 XXXwhole prefix which blocks →	LTE WIRELESS INC D/B/A LTE WIRELESS - NY	452J	NWYRCYZN12	NY
2019-12-23	385-317	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MORGAN	UT
2019-12-23	469-825	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - TX	004F	PLANO	TX
2019-12-23	469-838	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PLANO	TX
2019-12-23	515-766	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	AMES	IA
2019-12-23	539-238	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BRISTOW	OK
2019-12-23	563-500	0–9 XXXall 10 · 3 holders which blocks →	FRACTEL, LLC	965H	DUBUQUE	IA
2019-12-23	563-766	1XXX3XXX5XXX6XXX7XXX · 3 holders which blocks →	FRACTEL, LLC	965H	COLESBURG	IA
2019-12-23	563-900	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	DAVENPORT	IA

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.