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
2016-05-13	236-397	not yet reported which blocks →	Navigata Communications Limited	078G	Granisle	—
2016-05-13	236-398	not yet reported which blocks →	Navigata Communications Limited	078G	Grassy Plains	—
2016-05-13	236-399	not yet reported which blocks →	Navigata Communications Limited	078G	Hansard	—
2016-05-13	236-400	not yet reported which blocks →	Navigata Communications Limited	078G	Hixon	—
2016-05-13	236-401	not yet reported which blocks →	Navigata Communications Limited	078G	Mackenzie	—
2016-05-13	236-402	not yet reported which blocks →	Navigata Communications Limited	078G	McBride	—
2016-05-13	236-403	not yet reported which blocks →	Navigata Communications Limited	078G	McLeod Lake	—
2016-05-13	236-404	not yet reported which blocks →	Navigata Communications Limited	078G	Red Rock	—
2016-05-13	236-405	not yet reported which blocks →	Navigata Communications Limited	078G	Salmon Valley	—
2016-05-13	236-406	not yet reported which blocks →	Navigata Communications Limited	078G	Summit Lake	—
2016-05-13	236-407	not yet reported which blocks →	Navigata Communications Limited	078G	Tachie	—
2016-05-13	236-408	not yet reported which blocks →	Navigata Communications Limited	078G	Valemount	—
2016-05-13	236-409	not yet reported which blocks →	Navigata Communications Limited	078G	Vanderhoof	—
2016-05-13	236-410	not yet reported which blocks →	Navigata Communications Limited	078G	Fort St. James	—
2016-05-13	236-940	not yet reported which blocks →	Navigata Communications Limited	078G	Armstrong	—
2016-05-13	236-941	not yet reported which blocks →	Navigata Communications Limited	078G	Enderby	—
2016-05-13	236-942	not yet reported which blocks →	Navigata Communications Limited	078G	Falkland	—
2016-05-13	236-943	not yet reported which blocks →	Navigata Communications Limited	078G	Lumby	—
2016-05-13	239-666	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - FL	937C	FORT MYERS	FL
2016-05-13	318-577	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - LA	749E	CALHOUN	LA
2016-05-13	352-644	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - FL	937C	OCALA	FL
2016-05-13	407-634	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	ORLANDO	FL
2016-05-13	407-750	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	KISSIMMEE	FL
2016-05-13	561-569	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL	6502	BOCA RATON	FL
2016-05-13	607-306	0–9 XXXwhole prefix which blocks →	ONVOY, LLC- NY	384C	BINGHAMTON	NY
2016-05-13	618-491	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC	224C	COLLINSVL	IL
2016-05-13	702-934	0–9 XXXwhole prefix which blocks →	T-MOBILE USA, INC.	6529	LAS VEGAS	NV
2016-05-13	720-520	0–9 XXXall 10 · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	DENVER	CO
2016-05-13	727-220	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	STPETERSBG	FL
2016-05-13	786-482	0–9 XXXall 10 · 4 holders which blocks →	AT&T ENTERPRISES, LLC	516C	MIAMI	FL
2016-05-13	813-848	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	PLANT CITY	FL
2016-05-13	913-263	0–9 XXXwhole prefix which blocks →	AERIAL COMMUNICATIONS, INC.	6701	KANSASCITY	KS
2016-05-13	949-652	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SADLBK VLY	CA
2016-05-12	210-943	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	SANANTONIO	TX
2016-05-12	236-381	not yet reported which blocks →	Navigata Communications Limited	078G	Hartway	—
2016-05-12	236-382	not yet reported which blocks →	Navigata Communications Limited	078G	Pineview	—
2016-05-12	236-383	not yet reported which blocks →	Navigata Communications Limited	078G	Vanway	—
2016-05-12	236-384	not yet reported which blocks →	Navigata Communications Limited	078G	70 Mile House	—
2016-05-12	236-385	not yet reported which blocks →	Navigata Communications Limited	078G	Bear Lake	—
2016-05-12	236-386	not yet reported which blocks →	Navigata Communications Limited	078G	Burns Lake	—
2016-05-12	253-257	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	TACOMAWVLY	WA
2016-05-12	425-240	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
2016-05-12	507-703	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN	5816	WINONA	MN
2016-05-12	657-327	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	HUNTITNBCH	CA
2016-05-12	657-328	0–9 XXXall 10 · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	SANTA ANA	CA
2016-05-12	719-621	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	PUEBLO	CO
2016-05-12	740-665	0XXX1XXX5XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - OH	464C	GRATIOT	OH
2016-05-12	873-999	not yet reported which blocks →	TELUS Mobility	8303	Amos	—
2016-05-12	909-413	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	CHINO	CA
2016-05-12	985-244	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - LA	749E	KENTWOOD	LA

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.