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
2019-10-23	920-510	0–9 XXXall 10 · 4 holders which blocks →	ONVOY SPECTRUM, LLC	624H	GREEN BAY	WI
2019-10-22	212-540	0–9 XXXwhole prefix which blocks →	ONVOY, LLC- NY	384C	NWYRCYZN01	NY
2019-10-22	267-874	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - PA	002F	PHLDLPHZN3	PA
2019-10-22	365-635	not yet reported which blocks →	Iristel Inc.	154E	Markham	—
2019-10-22	365-636	not yet reported which blocks →	Iristel Inc.	154E	Markham	—
2019-10-22	367-677	not yet reported which blocks →	Iristel Inc.	346J	Sept-Iles	—
2019-10-22	402-258	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - NE	549E	BENNET	NE
2019-10-22	418-819	not yet reported which blocks →	Iristel Inc.	346J	Gaspe	—
2019-10-22	431-815	not yet reported which blocks →	Iristel Inc.	154E	Winnipeg	—
2019-10-22	431-816	not yet reported which blocks →	Iristel Inc.	154E	Winnipeg	—
2019-10-22	505-391	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - NM	206F	GRANTS	NM
2019-10-22	672-222	not yet reported which blocks →	Iristel Inc.	346J	Vancouver	—
2019-10-22	712-543	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	AIRUS, INC - IA	423H	UNDERWOOD	IA
2019-10-22	786-730	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - FL	982E	KEYS	FL
2019-10-22	813-587	0–9 XXXall 10 · 2 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - FL	8300	TAMPACEN	FL
2019-10-22	825-812	not yet reported which blocks →	Iristel Inc.	154E	Calgary	—
2019-10-22	848-282	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BELMAR	NJ
2019-10-22	856-271	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	HADDON HTS	NJ
2019-10-21	267-853	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	PHPHSBZN43	PA
2019-10-21	318-705	1XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLC - LA	749E	PL DEALING	LA
2019-10-21	318-710	0XXX2XXX3XXX7XXX9XXX · 2 holders which blocks →	ONVOY, LLC - LA	749E	SAREPTA	LA
2019-10-21	318-713	2XXX3XXX4XXX which blocks →	ONVOY, LLC - LA	749E	SHONGALOO	LA
2019-10-21	385-342	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - UT	871E	MIDVALE	UT
2019-10-21	385-348	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - UT	871E	KAYSVILLE	UT
2019-10-21	504-381	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA LA - LLC	653C	NEWORLEANS	LA
2019-10-21	505-374	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	FARMINGTON	NM
2019-10-21	641-327	0XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	WELLSBURG	IA
2019-10-21	719-506	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PUEBLO	CO
2019-10-21	984-253	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - NC	3235	HILLSBORGH	NC
2019-10-18	209-494	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	MODESTO	CA
2019-10-18	223-226	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	MANHEIM	PA
2019-10-18	365-799	not yet reported which blocks →	Iristel Inc.	154E	Oshawa	—
2019-10-18	409-250	0–9 XXXall 10 · 5 holders which blocks →	AERIAL COMMUNICATIONS, INC.	6701	PORTARTHUR	TX
2019-10-18	469-748	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MCKINNEY	TX
2019-10-18	506-797	not yet reported which blocks →	Iristel Inc.	154E	Moncton	—
2019-10-18	579-798	not yet reported which blocks →	Iristel Inc.	154E	Lachute	—
2019-10-18	639-385	not yet reported which blocks →	Iristel Inc.	154E	Lumsden	—
2019-10-18	639-805	not yet reported which blocks →	Iristel Inc.	154E	Saskatoon	—
2019-10-18	805-721	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PASOROBLES	CA
2019-10-18	873-808	not yet reported which blocks →	Iristel Inc.	154E	Trois-Rivieres	—
2019-10-18	901-467	0–9 XXXall 10 · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - TN	114F	MEMPHIS	TN
2019-10-17	219-587	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	CEDAR LAKE	IN
2019-10-17	219-758	0–9 XXXall 10 · 5 holders which blocks →	FRACTEL, LLC	965H	MERRILLVL	IN
2019-10-17	224-758	0–9 XXXall 10 · 7 holders which blocks →	FRACTEL, LLC	965H	ELK GROVE	IL
2019-10-17	249-802	not yet reported which blocks →	Iristel Inc.	154E	Haliburton	—
2019-10-17	249-803	not yet reported which blocks →	Iristel Inc.	154E	Markstay	—
2019-10-17	343-338	not yet reported which blocks →	Iristel Inc.	154E	Merrickville	—
2019-10-17	346-399	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	BAMMEL	TX
2019-10-17	437-822	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	Toronto	—
2019-10-17	437-833	not yet reported which blocks →	Rogers Communications Canada Inc. (Wireless)	8821	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.