Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
2020-08-27	437-447	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2020-08-27	437-500	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2020-08-27	437-600	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2020-08-27	437-747	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2020-08-27	437-900	not yet reported which blocks →	Iristel Inc.	154E	Toronto	—
2020-08-27	469-876	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ENNIS	TX
2020-08-27	502-755	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	LA GRANGE	KY
2020-08-27	530-382	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	AUBN MAIN	CA
2020-08-27	561-528	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	DELRAY BCH	FL
2020-08-27	628-682	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - CA	649C	NOVATO	CA
2020-08-27	662-856	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	478J	MEMPHIS	MS
2020-08-27	689-223	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	478J	ORLANDO	FL
2020-08-27	716-305	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	478J	BUFFALO	NY
2020-08-27	720-807	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - CO	026D	DENVER	CO
2020-08-27	737-274	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	BASTROP	TX
2020-08-27	743-235	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	478J	GREENSBORO	NC
2020-08-27	774-433	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	BARNSTABLE	MA
2020-08-27	845-785	1XXX which blocks →	NUSO, LLC	478J	POUGHKEPSI	NY
2020-08-27	859-465	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	FRACTEL, LLC	965H	MILLERBURG	KY
2020-08-27	901-554	0–9 XXXall 10 · 5 holders which blocks →	POWERTEL MEMPHIS LICENSES, INC.	7474	MEMPHIS	TN
2020-08-27	904-648	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	478J	JACKSONVL	FL
2020-08-27	908-417	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS, INC. - NJ	6623	BERNARDSVL	NJ
2020-08-27	909-846	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ARROWHEAD	CA
2020-08-27	980-443	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	478J	CHARLOTTE	NC
2020-08-27	984-263	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	478J	RALEIGH	NC
2020-08-26	223-237	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	478J	HARISBGZN1	PA
2020-08-26	225-449	0–9 XXXwhole prefix which blocks →	VOICESTREAM GSM I, LLC	150C	GONZALES	LA
2020-08-26	251-329	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	MOBILE	AL
2020-08-26	539-239	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	MUSKOGEE	OK
2020-08-26	580-360	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LAWTON	OK
2020-08-26	659-204	0–9 XXXall 10 · 6 holders which blocks →	POWERTEL BIRMINGHAM LICENSES, INC.	7475	BIRMINGHAM	AL
2020-08-26	659-206	0–9 XXXall 10 · 2 holders which blocks →	POWERTEL BIRMINGHAM LICENSES, INC.	7475	SPRINGVL	AL
2020-08-26	701-407	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	MLGC, L.L.C. - ND	287G	LEONARD	ND
2020-08-26	719-936	0–9 XXXall 10 · 6 holders which blocks →	N.E. COLORADO CELLULAR, INC.	6874	ALAMOSA	CO
2020-08-26	757-895	0–9 XXXall 10 · 4 holders which blocks →	TWILIO INTERNATIONAL, INC.	506J	NRFOLKZON1	VA
2020-08-26	854-212	0–9 XXXall 10 · 2 holders which blocks →	POWERTEL ATLANTA LICENSES, INC.	7473	BEAUFORT	SC
2020-08-26	864-685	0–9 XXXall 10 · 3 holders which blocks →	SUNCOM DBA T-MOBILE USA	8645	ANDERSON	SC
2020-08-26	872-269	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - IL	984E	CHICGOZN08	IL
2020-08-26	970-793	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	GREELEY	CO
2020-08-25	218-551	0–9 XXXall 10 · 4 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	CROOKSTON	MN
2020-08-25	219-288	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	FRACTEL, LLC	965H	ST JOHN	IN
2020-08-25	219-342	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	FRACTEL, LLC	965H	WESTVILLE	IN
2020-08-25	219-355	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	UNIONMILLS	IN
2020-08-25	219-388	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	WHEELER	IN
2020-08-25	219-732	0–9 XXXall 10 · 6 holders which blocks →	FRACTEL, LLC	965H	KOUTS	IN
2020-08-25	219-788	0–9 XXXall 10 · 4 holders which blocks →	FRACTEL, LLC	965H	HOBART	IN
2020-08-25	219-799	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	CHESTERTON	IN
2020-08-25	219-842	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	HANNA	IN
2020-08-25	219-867	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRACTEL, LLC	965H	DYER	IN
2020-08-25	219-899	8XXX9XXX · 2 holders which blocks →	FRACTEL, LLC	965H	MONON	IN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.