Recent prefix assignments

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

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

Rogers Communications Canada Inc. (Wireless) 46

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 28

NEW CINGULAR WIRELESS PCS, LLC - IL 23

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

Quick find in this area code:

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
—	425-527	6XXX7XXX8XXX9XXX which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BOTHELL	WA
—	425-528	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	RENTON	WA
—	425-529	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	RENTON	WA
—	425-530	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	EVERETT	WA
—	425-531	3XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
—	425-539	0–9 XXXall 10 · 3 holders which blocks →	ONVOY SPECTRUM, LLC	624H	EVERETT	WA
—	425-546	0–9 XXXall 10 · 3 holders which blocks →	NUSO, LLC	732J	BELLEVUE	WA
—	425-551	0XXX7XXX8XXX9XXX · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - WA	7146	EVERETT	WA
—	425-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	WA
—	425-556	not yet reported which blocks →	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	KIRKLAND	WA
—	425-557	not yet reported which blocks →	QWEST CORPORATION	9638	ISSAQUAH	WA
—	425-558	2XXX which blocks →	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	KIRKLAND	WA
—	425-562	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-563	0–9 XXXall 10 · 5 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7173	HALLS LAKE	WA
—	425-564	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-569	0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 TELECOM OF WASHINGTON, LLC - WA	7455	MAPLE VLY	WA
—	425-572	2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - WA	7146	RENTON	WA
—	425-576	not yet reported which blocks →	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	KIRKLAND	WA
—	425-577	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - WA	7146	BELLEVUE	WA
—	425-578	0XXX1XXX2XXX4XXX5XXX7XXX · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MAPLE VLY	WA
—	425-580	not yet reported which blocks →	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	KIRKLAND	WA
—	425-582	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	HALLS LAKE	WA
—	425-583	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA	5812	EVERETT	WA
—	425-584	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	ONVOY, LLC - WA	483E	MAPLE VLY	WA
—	425-585	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	WIDE VOICE, LLC - WA	707G	SILVERLAKE	WA
—	425-587	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - WA	7146	KIRKLAND	WA
—	425-590	7XXX9XXX · 2 holders which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-591	0XXX2XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
—	425-602	7XXX which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - WA	7146	KIRKLAND	WA
—	425-603	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-605	not yet reported which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	KIRKLAND	WA
—	425-606	0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA	5812	ISSAQUAH	WA
—	425-608	1XXX9XXX which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	HALLS LAKE	WA
—	425-609	not yet reported which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WA	6121	EVERETT	WA
—	425-610	0–9 XXXall 10 · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	EVERETT	WA
—	425-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WA
—	425-614	5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-625	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	BELLEVUE	WA
—	425-629	0XXX3XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 TELECOM OF WASHINGTON, LLC - WA	7455	KIRKLAND	WA
—	425-631	not yet reported which blocks →	SPOK, INC.	6630	BELLEVUE	WA
—	425-632	not yet reported which blocks →				WA
—	425-635	8XXX which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-636	3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA	7274	KIRKLAND	WA
—	425-637	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-638	2XXX3XXX9XXX which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-640	not yet reported which blocks →	ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER	4324	HALLS LAKE	WA
—	425-641	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-642	9XXX which blocks →	ONVOY, LLC - WA	483E	ISSAQUAH	WA
—	425-643	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA
—	425-644	not yet reported which blocks →	QWEST CORPORATION	9638	BELLEVUE	WA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.