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
—	307-269	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WY	9416	WHEATLAND	WY
—	307-270	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	COKEVILLE	WY
—	307-272	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	CODY	WY
—	307-273	1XXX which blocks →	CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK	2299	FARSON	WY
—	307-276	1XXX which blocks →	CENTURYTEL OF WYOMING, INC. DBA CENTURYLINK	2299	BIG PINEY	WY
—	307-279	not yet reported which blocks →	ALL WEST COMMUNICATIONS - WY	2290	COKEVILLE	WY
—	307-280	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	FARSON	WY
—	307-281	5XXX6XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	SUNDANCE	WY
—	307-282	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	SUNDANCE	WY
—	307-283	not yet reported which blocks →	RANGE TEL COOP INC	2251	SUNDANCE	WY
—	307-290	4XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SUNDANCE	WY
—	307-296	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - WY	450F	CODY	WY
—	307-297	not yet reported which blocks →	UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS	1772	GREENRIVER	WY
—	307-307	not yet reported which blocks →				WY
—	307-308	not yet reported which blocks →				WY
—	307-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WY
—	307-313	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WY	9416	EVANSTON	WY
—	307-314	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WY	081F	LARAMIE	WY
—	307-320	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	RAWLINS	WY
—	307-321	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	RAWLINS	WY
—	307-322	not yet reported which blocks →	QWEST CORPORATION	9636	WHEATLAND	WY
—	307-324	not yet reported which blocks →	QWEST CORPORATION	9636	RAWLINS	WY
—	307-325	not yet reported which blocks →	UNION TEL. CO.	2297	HANNA	WY
—	307-326	not yet reported which blocks →	UNION TEL. CO.	2297	SARATOGA	WY
—	307-327	not yet reported which blocks →	UNION TEL. CO.	2297	ENCAMPMENT	WY
—	307-328	5XXX which blocks →	QWEST CORPORATION	9636	RAWLINS	WY
—	307-329	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	SARATOGA	WY
—	307-330	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	LANDER	WY
—	307-331	6XXX7XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	WHEATLAND	WY
—	307-332	not yet reported which blocks →	QWEST CORPORATION	9636	LANDER	WY
—	307-333	0–9 XXXall 10 · 4 holders which blocks →	NUSO, LLC	732J	CASPER	WY
—	307-334	1XXX which blocks →	QWEST CORPORATION	9636	LUSK	WY
—	307-335	1XXX3XXX4XXX5XXX · 3 holders which blocks →	QWEST CORPORATION	9636	LANDER	WY
—	307-339	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	HANNA	WY
—	307-340	3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	LUSK	WY
—	307-341	not yet reported which blocks →	PROJECT TEL. CO., INC.	2250	SOUTHWYOLA	WY
—	307-342	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - WY	450F	JACKSON	WY
—	307-344	1XXX3XXX4XXX · 2 holders which blocks →	QWEST CORPORATION	9636	MAMMOTH	WY
—	307-345	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	LANDER	WY
—	307-347	not yet reported which blocks →	RT COMMUNICATIONS	3410	WORLAND	WY
—	307-348	not yet reported which blocks →	UNION TEL. CO.	2297	HANNA	WY
—	307-349	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	LANDER	WY
—	307-350	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	ROCK SPG	WY
—	307-351	7XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	DOUGLAS	WY
—	307-352	9XXX which blocks →	QWEST CORPORATION	9636	ROCK SPG	WY
—	307-353	not yet reported which blocks →	COLUMBINE TELCO DBA SILVER STAR COMMUNICATIONS	2214	ALTA	WY
—	307-356	not yet reported which blocks →	UNION TEL. CO.	2297	SHIRLEBSIN	WY
—	307-358	not yet reported which blocks →	QWEST CORPORATION	9636	DOUGLAS	WY
—	307-359	4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY	6566	DOUGLAS	WY
—	307-360	not yet reported which blocks →	UNION TELEPHONE COMPANY	013B	PINEDALE	WY

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.