Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 580

ONVOY, LLC - OK 1

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
—	580-278	0XXX2XXX3XXX8XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	ENID	OK
—	580-279	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	METROPCS, INC.	5562	ADA	OK
—	580-280	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	LAWTON	OK
—	580-281	none assigned yet which blocks →	SANTA ROSA TEL COOP INC	2141	RANDLETT	OK
—	580-283	not yet reported which blocks →	CHEROKEE TEL. CO.	1979	ACHILLE	OK
—	580-284	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	LAWTON	OK
—	580-285	not yet reported which blocks →	CHEROKEE TEL. CO.	1979	YUBA	OK
—	580-286	not yet reported which blocks →	SOUTHWESTERN BELL	9533	IDABEL	OK
—	580-287	none assigned yet which blocks →	SOUTHWEST OKLAHOMA TEL. CO.	2025	WILLOW	OK
—	580-288	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks →	ONVOY, LLC - OK	409F	KREMLIN	OK
—	580-289	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - OK	409F	RINGLING	OK
—	580-293	not yet reported which blocks →	KANOKLA TEL ASSN	1788	SOHARDTNER	OK
—	580-294	not yet reported which blocks →	CHICKASAW TEL. CO.	1980	GENE AUTRY	OK
—	580-295	not yet reported which blocks →	CHEROKEE TEL. CO.	1979	BOKCHITO	OK
—	580-296	not yet reported which blocks →	CHEROKEE TEL. CO.	1979	COLBERT	OK
—	580-298	0XXX8XXX · 2 holders which blocks →	SOUTHWESTERN BELL	9533	ANTLERS	OK
—	580-299	not yet reported which blocks →	SANTA ROSA TEL COOP INC	2141	DEVOL	OK
—	580-300	0XXX1XXX3XXX · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK	7258	MARIETTA	OK
—	580-301	2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	ALTUS	OK
—	580-303	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	ELK CITY	OK
—	580-305	4XXX5XXX7XXX · 2 holders which blocks →	UNITED STATES CELLULAR - OK	6272	FREDERICK	OK
—	580-306	not yet reported which blocks →	PINE TEL. CO.	2017	BROKEN BOW	OK
—	580-310	8XXX which blocks →	SOUTHWESTERN BELL	9533	ADA	OK
—	580-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	OK
—	580-314	not yet reported which blocks →	PINE TELEPHONE COMPANY DBA PINE CELL PHONES, INC.	235C	BROKEN BOW	OK
—	580-316	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	ONVOY, LLC - OK	409F	MADILL	OK
—	580-317	0XXX6XXX which blocks →	SOUTHWESTERN BELL	9533	HUGO	OK
—	580-320	none assigned yet which blocks →	UNITED STATES CELLULAR - OK	6272	ADA	OK
—	580-322	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAURIKA	OK
—	580-323	not yet reported which blocks →	SOUTHWESTERN BELL	9533	CLINTON	OK
—	580-324	0–9 XXXall 10 · 6 holders which blocks →	METROPCS, INC.	5562	ENID	OK
—	580-325	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	ONVOY, LLC - OK	409F	HILLSDALE	OK
—	580-326	not yet reported which blocks →	SOUTHWESTERN BELL	9533	HUGO	OK
—	580-327	9XXX which blocks →	SOUTHWESTERN BELL	9533	ALVA	OK
—	580-328	not yet reported which blocks →	DOBSON TEL. CO.	1988	TALOGA	OK
—	580-329	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks →	ONVOY, LLC - OK	409F	CARRIER	OK
—	580-330	1XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WEATHERFD	OK
—	580-331	0XXX4XXX5XXX6XXX · 4 holders which blocks →	SOUTHWESTERN BELL	9533	CLINTON	OK
—	580-332	not yet reported which blocks →	SOUTHWESTERN BELL	9533	ADA	OK
—	580-333	3XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	COMANCHE	OK
—	580-334	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK	5813	WOODWARD	OK
—	580-335	none assigned yet which blocks →	PIONEER TEL. COOP., INC.	2018	FREDERICK	OK
—	580-336	6XXX which blocks →	SOUTHWESTERN BELL	9533	PERRY	OK
—	580-337	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	SOUTHWESTERN BELL	9533	BESSIE	OK
—	580-338	not yet reported which blocks →	PANHANDLE TELEPHONE COOPERATIVE, INC.	2016	GUYMON	OK
—	580-340	2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	ARDMORE	OK
—	580-341	1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	T-MOBILE USA, INC.	6529	ARDMORE	OK
—	580-342	not yet reported which blocks →	PIONEER TEL. COOP., INC.	2018	TEMPLE	OK
—	580-343	not yet reported which blocks →	WINDSTREAM OKLAHOMA, INC.	1965	CORN	OK
—	580-345	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	SOUTHWESTERN BELL	9533	SOPER	OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.