Recent prefix assignments

1 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 385

LEVEL 3 COMMUNICATIONS, LLC - UT 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
2016-01-08	385-388	0–9 XXXall 10 · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - UT	7530	MURRAY	UT
2016-01-04	385-389	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	OGDEN	UT
2015-12-29	385-250	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - UT	871E	PROVO	UT
2015-12-11	385-630	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	SALT LAKE	UT
2015-12-07	385-455	0–9 XXXall 10 · 4 holders which blocks →	FIRSTDIGITAL COMMUNICATIONS, LLC	716D	LEHI	UT
2015-12-07	385-707	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - UT	871E	SALT LAKE	UT
2015-11-20	385-247	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - UT	871E	MIDVALE	UT
2015-11-12	385-770	0–9 XXXall 10 · 4 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7176	SALT LAKE	UT
2015-11-11	385-477	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	PROVO	UT
2015-11-02	385-557	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MIDVALE	UT
2015-10-06	385-257	0–9 XXXall 10 · 3 holders which blocks →	FIRSTDIGITAL COMMUNICATIONS, LLC	716D	MURRAY	UT
2015-09-28	385-272	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2015-08-27	385-262	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF UTAH, LLC - UT	526H	KAYSVILLE	UT
2015-08-27	385-895	0–9 XXXall 10 · 7 holders which blocks →	PEERLESS NETWORK OF UTAH, LLC - UT	526H	PAYSON	UT
2015-08-07	385-383	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - UT	3231	CLEARFIELD	UT
2015-07-31	385-775	0–9 XXXall 10 · 3 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7176	SALT LAKE	UT
2015-06-19	385-298	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	OGDEN	UT
2015-06-19	385-529	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MIDVALE	UT
2015-05-21	385-368	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	KAYSVILLE	UT
2015-03-17	385-900	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - UT	871E	MIDVALE	UT
2015-03-04	385-448	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SPANIHFORK	UT
2015-02-17	385-685	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	SPRINGVL	UT
2015-02-16	385-243	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	BOUNTIFUL	UT
2015-02-16	385-246	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	MIDVALE	UT
2015-02-16	385-323	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	PLEASATGRV	UT
2015-02-16	385-988	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	FARMINGTON	UT
2015-02-03	385-881	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF UTAH, LLC - UT	526H	SALT LAKE	UT
2015-01-22	385-248	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	PROVO	UT
2015-01-21	385-625	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	PROVO	UT
2015-01-13	385-352	0–9 XXXall 10 · 7 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	7176	LEHI	UT
2014-12-23	385-645	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MIDVALE	UT
2014-12-11	385-715	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SALT LAKE	UT
2014-11-13	385-498	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	AMERCNFORK	UT
2014-10-31	385-240	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	OGDEN	UT
2014-10-24	385-445	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	KAYSVILLE	UT
2014-10-22	385-424	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	KAYSVILLE	UT
2014-10-20	385-347	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MURRAY	UT
2014-10-17	385-249	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT	6571	SALT LAKE	UT
2014-10-14	385-495	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SALT LAKE	UT
2014-10-09	385-549	0–9 XXXall 10 · 4 holders which blocks →	FIRSTDIGITAL TELECOM, LLC - UT	5727	SALT LAKE	UT
2014-10-02	385-255	0–9 XXXall 10 · 4 holders which blocks →	FIRSTDIGITAL TELECOM, LLC - UT	5727	MIDVALE	UT
2014-09-16	385-350	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - UT	117F	MORGAN	UT
2014-09-04	385-241	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	PROVO	UT
2014-09-02	385-419	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	SALT LAKE	UT
2014-08-29	385-309	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PROVO	UT
2014-08-29	385-539	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	PROVO	UT
2014-08-29	385-831	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	SALT LAKE	UT
2014-08-19	385-237	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	MIDVALE	UT
2014-08-19	385-238	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	OGDEN	UT
2014-07-18	385-231	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	KAYSVILLE	UT

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.