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 413

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 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
2018-03-02	413-571	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	WESTFIELD	MA
2018-02-05	413-319	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MA	892D	HOLYOKE	MA
2018-01-06	413-861	0–9 XXXwhole prefix which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	SPRINGFLD	MA
2017-09-22	413-291	0–9 XXXall 10 · 2 holders which blocks →	ONVOY SPECTRUM, LLC	624H	SPRINGFLD	MA
2017-06-06	413-795	0–9 XXXwhole prefix which blocks →	PAETEC ITEL, LLC	829J	SPRINGFLD	MA
2017-05-05	413-287	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MA	892D	RUSSELL	MA
2017-04-17	413-299	0–9 XXXall 10 · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA	7103	HATFIELD	MA
2017-03-22	413-278	0–9 XXXall 10 · 5 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SPRINGFLD	MA
2016-09-22	413-412	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	NORTHADAMS	MA
2016-09-21	413-507	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	SPRINGFLD	MA
2016-05-17	413-707	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MA	892D	SPRINGFLD	MA
2015-01-22	413-417	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	SPRINGFLD	MA
2015-01-10	413-270	0–9 XXXall 10 · 5 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	NORTHAMPTN	MA
2014-10-14	413-409	0–9 XXXall 10 · 6 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	HOLYOKE	MA
2014-06-17	413-406	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AMHERST	MA
2014-06-10	413-930	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MA	892D	SPRINGFLD	MA
2014-05-22	413-316	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	SPRINGFLD	MA
2014-03-06	413-404	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AMHERST	MA
2014-02-26	413-310	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	SPRINGFLD	MA
2013-10-16	413-317	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	SPRINGFLD	MA
2013-06-12	413-801	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AMHERST	MA
2013-05-21	413-402	0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	SHEFFIELD	MA
2013-03-29	413-309	0–9 XXXwhole prefix which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	SPRINGFLD	MA
2012-10-24	413-302	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	SPRINGFLD	MA
2012-09-04	413-372	0–9 XXXall 10 · 6 holders which blocks →	PAETEC ITEL, LLC	829J	SPRINGFLD	MA
2012-06-11	413-307	0–9 XXXall 10 · 5 holders which blocks →	AT&T - LOCAL	7421	ADAMS	MA
2012-03-13	413-276	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	SPRINGFLD	MA
2011-12-07	413-234	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	SPRINGFLD	MA
2011-08-24	413-255	0XXX2XXX3XXX5XXX6XXX7XXX · 2 holders which blocks →	COMCAST IP PHONE, LLC	318J	GRANBY	MA
2011-06-10	413-799	0–9 XXXall 10 · 2 holders which blocks →	CRC COMMUNICATIONS OF MAINE, INC. - MA	236F	SPRINGFLD	MA
2011-03-18	413-400	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	MONTAGUE	MA
2010-10-08	413-300	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	DALTON	MA
2010-09-30	413-344	0–9 XXXall 10 · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	PITTSFIELD	MA
2010-09-01	413-216	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	BECKET	MA
2010-05-13	413-355	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	SPRINGFLD	MA
2010-02-09	413-359	0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	COLRAIN	MA
2009-12-28	413-314	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - MA	892D	SPRINGFLD	MA
2009-09-15	413-365	0–9 XXXwhole prefix which blocks →	VERIZON NEW ENGLAND INC.	9102	PITTSFIELD	MA
2009-05-15	413-350	0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks →	TC SYSTEMS, INC.	7135	SO DEERFLD	MA
2009-05-11	413-345	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	AMHERST	MA
2009-04-30	413-285	0–9 XXXall 10 · 5 holders which blocks →	RINGSQUARED TELECOM LLC	311D	SPRINGFLD	MA
2008-10-10	413-336	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	AMHRSTFKLN	MA
2008-09-15	413-340	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WILLIAMSBG	MA
2008-09-11	413-777	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	SPRINGFLD	MA
2008-06-10	413-342	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	SPRINGFLD	MA
2008-01-02	413-391	0–9 XXXall 10 · 4 holders which blocks →	YMAX COMMUNICATIONS CORP. - MA	316E	SPRINGFLD	MA
2007-06-26	413-835	0–9 XXXall 10 · 4 holders which blocks →	COMCAST IP PHONE, LLC	318J	AMHERST	MA
2006-07-07	413-686	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	SPRINGFLD	MA
2006-04-10	413-676	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks →	PAETEC ITEL, LLC	829J	TURNERSFLS	MA
2006-03-23	413-505	0–9 XXXall 10 · 4 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SPRINGFLD	MA

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.