Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 307

UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS 2

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
—	307-751	none assigned yet which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SHERIDAN	WY
—	307-752	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	SHERIDAN	WY
—	307-754	not yet reported which blocks →	QWEST CORPORATION	9636	POWELL	WY
—	307-755	not yet reported which blocks →	QWEST CORPORATION	9636	LARAMIE	WY
—	307-756	none assigned yet which blocks →	RT COMMUNICATIONS	3410	MOORCROFT	WY
—	307-757	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	CHEYENNE	WY
—	307-758	not yet reported which blocks →	RANGE TEL COOP INC	2251	CLEARMONT	WY
—	307-760	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	LARAMIE	WY
—	307-761	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	LARAMIE	WY
—	307-762	not yet reported which blocks →	TRI-COUNTY TEL. ASSN., INC.	2296	BURLINGTON	WY
—	307-763	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	SHERIDAN	WY
—	307-765	not yet reported which blocks →	TRI-COUNTY TEL. ASSN., INC.	2296	GREYBULL	WY
—	307-766	not yet reported which blocks →	QWEST CORPORATION	9636	LARAMIE	WY
—	307-771	not yet reported which blocks →	QWEST CORPORATION	9636	CHEYENNE	WY
—	307-772	1XXX which blocks →	QWEST CORPORATION	9636	CHEYENNE	WY
—	307-773	not yet reported which blocks →	QWEST CORPORATION	9636	CHEYENNE	WY
—	307-775	not yet reported which blocks →	QWEST CORPORATION	9636	CHEYENNE	WY
—	307-777	not yet reported which blocks →	QWEST CORPORATION	9636	CHEYENNE	WY
—	307-778	not yet reported which blocks →	QWEST CORPORATION	9636	CHEYENNE	WY
—	307-780	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	MT VIEW	WY
—	307-782	not yet reported which blocks →	UNION TEL. CO.	2297	MT VIEW	WY
—	307-783	not yet reported which blocks →	QWEST CORPORATION	9636	EVANSTON	WY
—	307-786	not yet reported which blocks →	UNION TEL. CO.	2297	URIE	WY
—	307-787	not yet reported which blocks →	UNION TEL. CO.	2297	LYMAN	WY
—	307-788	2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY	4531	WEST LYMAN	WY
—	307-789	not yet reported which blocks →	QWEST CORPORATION	9636	EVANSTON	WY
—	307-799	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	EVANSTON	WY
—	307-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WY
—	307-828	0XXX1XXX5XXX7XXX · 2 holders which blocks →	QWEST CORPORATION	9636	KEMMERER	WY
—	307-834	8XXX which blocks →	UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY	4531	LA GRANGE	WY
—	307-836	8XXX which blocks →	UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY	4531	GUERNSEY	WY
—	307-837	9XXX which blocks →	UNITED TEL CO WEST - WY DBA CENTURYLINK WEST - WY	4531	LINGLE	WY
—	307-840	7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	RIVERTON	WY
—	307-849	not yet reported which blocks →	QWEST CORPORATION	9636	BORDER	WY
—	307-850	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	RIVERTON	WY
—	307-851	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	RIVERTON	WY
—	307-855	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	QWEST CORPORATION	9636	RIVERTON	WY
—	307-856	not yet reported which blocks →	QWEST CORPORATION	9636	RIVERTON	WY
—	307-857	8XXX which blocks →	QWEST CORPORATION	9636	RIVERTON	WY
—	307-858	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	RIVERTON	WY
—	307-859	0XXX which blocks →	CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK	2299	DANIEL	WY
—	307-864	not yet reported which blocks →	RT COMMUNICATIONS	3410	THERMOPOLS	WY
—	307-867	not yet reported which blocks →	TRI-COUNTY TEL. ASSN., INC.	2296	HAMITNDOME	WY
—	307-868	not yet reported which blocks →	TRI-COUNTY TEL. ASSN., INC.	2296	MEETEETSE	WY
—	307-870	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	GREENRIVER	WY
—	307-871	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	GREENRIVER	WY
—	307-872	not yet reported which blocks →	QWEST CORPORATION	9636	GREENRIVER	WY
—	307-874	not yet reported which blocks →	UNION TEL. CO.	2297	MANILA	WY
—	307-875	not yet reported which blocks →	QWEST CORPORATION	9636	GREENRIVER	WY
—	307-876	not yet reported which blocks →	RT COMMUNICATIONS	3410	SHOSHONI	WY

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.