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 719

8X8, INC. 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
2016-08-23	719-308	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	COLORDOSPG	CO
2016-06-23	719-394	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2016-05-12	719-621	0–9 XXXall 10 · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	PUEBLO	CO
2016-04-25	719-728	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	PEYTON	CO
2016-03-03	719-917	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	LEADVILLE	CO
2015-12-24	719-249	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2015-11-12	719-400	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2015-09-28	719-819	0–9 XXXall 10 · 2 holders which blocks →	WIDE VOICE, LLC - CO	557H	COLORDOSPG	CO
2015-08-27	719-960	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	COLORDOSPG	CO
2015-08-13	719-600	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2015-07-29	719-985	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	COLORDOSPG	CO
2015-01-29	719-900	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2014-10-31	719-470	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PUEBLO	CO
2014-10-30	719-301	0–9 XXXall 10 · 2 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	COLORDOSPG	CO
2014-10-27	719-888	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2014-10-24	719-398	0–9 XXXall 10 · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	BUENAVISTA	CO
2014-10-23	719-280	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF COLORADO, LLC - CO	278F	FLORENCE	CO
2014-10-21	719-396	0–9 XXXall 10 · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	PEYTON	CO
2014-10-15	719-663	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	COLORDOSPG	CO
2014-09-01	719-317	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLORDOSPG	CO
2014-09-01	719-366	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLORDOSPG	CO
2014-09-01	719-415	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	PUEBLO	CO
2014-08-12	719-419	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLORDOSPG	CO
2014-07-30	719-822	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	COLORDOSPG	CO
2014-03-31	719-309	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF COLORADO, LLC - CO	278F	COLORDOSPG	CO
2014-03-26	719-399	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CO	6118	AGUILAR	CO
2014-03-13	719-725	0–9 XXXall 10 · 2 holders which blocks →	ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM	3467	COLORDOSPG	CO
2014-02-20	719-722	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	COLORDOSPG	CO
2014-02-12	719-281	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	PUEBLO	CO
2013-11-13	719-639	0–9 XXXall 10 · 3 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	COLORDOSPG	CO
2013-09-09	719-354	0–9 XXXall 10 · 3 holders which blocks →	T-MOBILE USA, INC.	6529	COLORDOSPG	CO
2013-08-22	719-270	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	CRIPPLECRK	CO
2013-05-22	719-453	0–9 XXXall 10 · 2 holders which blocks →	T-MOBILE USA, INC.	6529	COLORDOSPG	CO
2013-04-16	719-551	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	COLORDOSPG	CO
2013-04-15	719-493	0–9 XXXall 10 · 5 holders which blocks →	TELIAX, INC. - CO	567G	COLORDOSPG	CO
2013-03-18	719-299	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - CO	078F	PUEBLO	CO
2012-11-08	719-999	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2012-11-07	719-800	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	CALHAN	CO
2012-10-17	719-424	0–9 XXXall 10 · 7 holders which blocks →	NUSO, LLC	551G	COLORDOSPG	CO
2012-08-31	719-247	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	COLORDOSPG	CO
2012-06-11	719-367	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - CO	026D	PEYTON	CO
2012-04-16	719-644	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	COLORDOSPG	CO
2012-03-19	719-368	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	COLORDOSPG	CO
2012-02-29	719-421	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	EL PASO	CO
2012-02-10	719-305	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF COLORADO, LLC - CO	7590	COLORDOSPG	CO
2011-12-12	719-426	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2011-07-07	719-418	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - CO	026D	COLORDOSPG	CO
2011-07-06	719-373	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC	6010	COLORDOSPG	CO
2011-04-12	719-377	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO	6567	COLORDOSPG	CO
2011-01-07	719-458	0–9 XXXall 10 · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	CANON CITY	CO

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.