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
2016-03-08	639-365	not yet reported which blocks →	Bell Mobility	6574	Moosomin	—
2016-03-08	639-366	not yet reported which blocks →	Bell Mobility	6574	Southey	—
2016-03-08	639-367	not yet reported which blocks →	Bell Mobility	6574	Whitewood	—
2016-03-08	639-368	not yet reported which blocks →	Bell Mobility	6574	Kipling	—
2016-03-08	639-421	not yet reported which blocks →	Bell Mobility	6574	Wakaw	—
2016-03-08	639-422	not yet reported which blocks →	Bell Mobility	6574	Watrous	—
2016-03-08	639-423	not yet reported which blocks →	Bell Mobility	6574	Biggar	—
2016-03-08	639-424	not yet reported which blocks →	Bell Mobility	6574	Lanigan	—
2016-03-08	639-425	not yet reported which blocks →	Bell Mobility	6574	Outlook	—
2016-03-08	639-426	not yet reported which blocks →	Bell Mobility	6574	Rosthern	—
2016-03-08	910-807	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - NC	638E	CASTLEHAYN	NC
2016-03-08	971-347	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	551G	PORTLAND	OR
2016-03-08	971-370	0–9 XXXall 10 · 7 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - OR	7531	SILVERTON	OR
2016-03-08	980-243	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NC	638E	BESSEMERCY	NC
2016-03-07	206-771	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	SEATTLE	WA
2016-03-07	219-336	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - IN	097D	MICHIGANCY	IN
2016-03-07	336-571	0–9 XXXall 10 · 5 holders which blocks →	RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC	769H	ELKIN	NC
2016-03-07	365-654	not yet reported which blocks →	Iristel Inc.	154E	Markham	—
2016-03-07	365-655	not yet reported which blocks →	Iristel Inc.	154E	Markham	—
2016-03-07	480-930	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - AZ	630E	PHOENIX	AZ
2016-03-07	505-305	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NM	206F	ALBUQURQUE	NM
2016-03-07	518-501	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC- NY	384C	SOBETHLEHM	NY
2016-03-07	573-430	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FLAT RIVER	MO
2016-03-07	579-794	not yet reported which blocks →	Iristel Inc.	154E	St-Jean	—
2016-03-07	579-996	not yet reported which blocks →	Iristel Inc.	154E	St-Lin	—
2016-03-07	579-997	not yet reported which blocks →	Iristel Inc.	154E	St-Hyacinthe	—
2016-03-07	579-998	not yet reported which blocks →	Iristel Inc.	154E	St-Jerome	—
2016-03-07	581-803	not yet reported which blocks →	Iristel Inc.	154E	St-Felicien	—
2016-03-07	581-804	not yet reported which blocks →	Iristel Inc.	154E	St-Tite-des-Caps	—
2016-03-07	587-496	not yet reported which blocks →	TELUS	8084	Calgary	—
2016-03-07	639-396	not yet reported which blocks →	Iristel Inc.	154E	Rosthern	—
2016-03-07	639-533	not yet reported which blocks →	Bell Mobility	6574	Prince Albert	—
2016-03-07	639-534	not yet reported which blocks →	Bell Mobility	6574	Estevan	—
2016-03-07	639-535	not yet reported which blocks →	Bell Mobility	6574	Humboldt	—
2016-03-07	639-536	not yet reported which blocks →	Bell Mobility	6574	Lloydminster	—
2016-03-07	639-537	not yet reported which blocks →	Bell Mobility	6574	Meadow Lake	—
2016-03-07	639-538	not yet reported which blocks →	Bell Mobility	6574	Moose Jaw	—
2016-03-07	639-539	not yet reported which blocks →	Bell Mobility	6574	Kindersley	—
2016-03-07	639-540	not yet reported which blocks →	Bell Mobility	6574	Yorkton	—
2016-03-07	639-541	not yet reported which blocks →	Bell Mobility	6574	Swift Current	—
2016-03-07	657-303	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA ANA	CA
2016-03-07	657-304	0–9 XXXall 10 · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SANTA ANA	CA
2016-03-07	708-892	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC	224C	CRETE	IL
2016-03-07	709-705	not yet reported which blocks →	Iristel Inc.	154E	St. John's	—
2016-03-07	731-248	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	ONVOY, LLC - TN	525E	GIBSON	TN
2016-03-07	737-781	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX	6506	AUSTIN	TX
2016-03-07	778-572	not yet reported which blocks →	TELUS	8086	Haney	—
2016-03-07	845-299	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CATSKILLS COMMUNICATIONS, INC - NY	360H	LIVISTNMNR	NY
2016-03-07	850-781	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	PACE	FL
2016-03-07	865-737	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - TN	525E	NORRIS	TN

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.