Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 21

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
—	319-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	319-821	not yet reported which blocks →	T-MOBILE USA, INC.	6529	ANAMOSA	IA
—	319-822	not yet reported which blocks →	DUNKERTON TEL. COOP.	1153	DUNKERTON	IA
—	319-824	7XXX8XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	GRUNDY CTR	IA
—	319-825	not yet reported which blocks →	AUREON COMMUNICATIONS, LLC	444G	GRUNDY CTR	IA
—	319-827	none assigned yet which blocks →	FARMERS MUTUAL TEL. CO.	1171	JESUP	IA
—	319-828	not yet reported which blocks →	SOUTH SLOPE COOPERATIVE TELEPHONE COMPANY - IA	562E	OXFORD	IA
—	319-830	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	WATERLOO	IA
—	319-832	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-833	not yet reported which blocks →	QWEST CORPORATION	9631	WATERLOO	IA
—	319-834	0XXX9XXX which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-835	2XXX4XXX6XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	DONNELLSON	IA
—	319-836	0XXX3XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PRIMROSE	IA
—	319-837	3XXX4XXX5XXX7XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	WEST POINT	IA
—	319-838	5XXX6XXX7XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	ARGYLE	IA
—	319-841	not yet reported which blocks →	SOUTH SLOPE COOP. TEL. CO., INC.	1298	ELY	IA
—	319-842	not yet reported which blocks →	FARMERS MUTUAL TEL. CO.	1173	ALBURNETT	IA
—	319-845	not yet reported which blocks →	SOUTH SLOPE COOP. TEL. CO., INC.	1298	FAIRFAX	IA
—	319-846	not yet reported which blocks →	SOUTH SLOPE COOP. TEL. CO., INC.	1298	FAIRFAX	IA
—	319-848	not yet reported which blocks →	SOUTH SLOPE COOP. TEL. CO., INC.	1298	ELY	IA
—	319-849	0XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	CENTER PT	IA
—	319-850	4XXX5XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	BURLINGTON	IA
—	319-851	not yet reported which blocks →	PALO COOP. TEL. ASSN.	1269	PALO	IA
—	319-854	not yet reported which blocks →	SPRINGVILLE COOP. TEL. ASSN., INC.	1302	SPRINGVL	IA
—	319-857	not yet reported which blocks →	SOUTH SLOPE COOP. TEL. CO., INC.	1298	SWISHER	IA
—	319-859	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	CEDARFALLS	IA
—	319-861	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-862	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-863	4XXX5XXX6XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	WASHINGTON	IA
—	319-865	0XXX2XXX6XXX8XXX9XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MOUNTUNION	IA
—	319-866	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-868	8XXX which blocks →	MUTUAL TEL. CO. OF MORNING SUN	1250	MORNINGSUN	IA
—	319-874	not yet reported which blocks →	QWEST CORPORATION	9631	WATERLOO	IA
—	319-878	0XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	FARMINGTON	IA
—	319-882	not yet reported which blocks →	BUTLER-BREMER MUTUAL TEL. CO.	1115	TRIPOLI	IA
—	319-885	not yet reported which blocks →	BUTLER-BREMER MUTUAL TEL. CO.	1115	SHELL ROCK	IA
—	319-887	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-888	0–9 XXXall 10 · 7 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	WATERLOO	IA
—	319-892	not yet reported which blocks →	PAETEC ITEL, LLC	829J	CEDAR RPDS	IA
—	319-895	1XXX2XXX3XXX7XXX · 2 holders which blocks →	QWEST CORPORATION	9631	MT VERNON	IA
—	319-896	not yet reported which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-899	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CEDAR RPDS	IA
—	319-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	319-929	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	CEDAR RPDS	IA
—	319-930	3XXX9XXX · 2 holders which blocks →	UNITED STATES CELLULAR - IA	6266	IOWA CITY	IA
—	319-931	9XXX which blocks →	UNITED STATES CELLULAR - IA	6266	MTPLEASANT	IA
—	319-934	not yet reported which blocks →	EAST BUCHANAN TEL. COOP.	1156	QUASQUETON	IA
—	319-935	not yet reported which blocks →	EAST BUCHANAN TEL. COOP.	1156	WINTHROP	IA
—	319-936	not yet reported which blocks →	T-MOBILE USA, INC.	6529	IOWA CITY	IA
—	319-937	not yet reported which blocks →	MEDIAPOLIS TEL. CO.	1251	KINGSTON	IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.