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
2016-09-21	272-209	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	WILLIAMSPT	PA
2016-09-21	308-474	3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	BERTRAND	NE
2016-09-21	343-490	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Kanata-Stittsville	—
2016-09-21	360-660	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	ABERDEEN	WA
2016-09-21	360-728	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	BREMERTON	WA
2016-09-21	413-507	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	SPRINGFLD	MA
2016-09-21	423-818	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - TN	525E	JELLICO	TN
2016-09-21	424-421	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	BEVERLYHLS	CA
2016-09-21	437-200	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-201	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-202	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-203	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-204	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-205	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-206	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-207	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-208	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	437-209	not yet reported which blocks →	TELUS Mobility	8303	Toronto	—
2016-09-21	442-297	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	EL CENTRO	CA
2016-09-21	563-521	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	MAQUOKETA	IA
2016-09-21	573-798	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - MO	093F	MOREHOUSE	MO
2016-09-21	573-966	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MO	093F	LEADWOOD	MO
2016-09-21	603-484	0–9 XXXall 10 · 5 holders which blocks →	BELL ATLANTIC MOBILE, INC	6386	NASHUA	NH
2016-09-21	619-833	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CA	649C	JACUMBA	CA
2016-09-21	650-476	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	HALFMOONBY	CA
2016-09-21	651-435	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2016-09-21	657-346	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SANTA ANA	CA
2016-09-21	669-213	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	SNJS NORTH	CA
2016-09-21	669-283	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SNJS WEST	CA
2016-09-21	669-284	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SNJS NORTH	CA
2016-09-21	682-408	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ARLINGTON	TX
2016-09-21	763-339	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	TWINCITIES	MN
2016-09-21	778-249	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Newton	—
2016-09-21	778-662	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	North Vancouver	—
2016-09-21	778-663	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Richmond	—
2016-09-21	778-664	not yet reported which blocks →	Primus Telecommunications Canada Inc.	201A	Whalley	—
2016-09-21	782-337	not yet reported which blocks →	TELUS Integrated Communications	2782	Caledonia	—
2016-09-21	857-409	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2016-09-21	857-505	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	BOSTON	MA
2016-09-21	857-507	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BOSTON	MA
2016-09-21	916-260	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	FOLSOM	CA
2016-09-21	951-495	0–9 XXXwhole prefix which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	RIVERSIDE	CA
2016-09-20	226-961	not yet reported which blocks →	Fido Solutions Inc.	5643	Windsor	—
2016-09-20	236-882	not yet reported which blocks →	Fido Solutions Inc.	5643	Victoria	—
2016-09-20	269-242	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	PLAINWELL	MI
2016-09-20	343-987	not yet reported which blocks →	Fido Solutions Inc.	5643	Ottawa-Hull	—
2016-09-20	409-240	0–9 XXXall 10 · 2 holders which blocks →	SOUTHWESTERN BELL	9533	BEAUMONT	TX
2016-09-20	437-981	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-09-20	437-982	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—
2016-09-20	437-983	not yet reported which blocks →	Fido Solutions Inc.	5643	Toronto	—

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.