Recent prefix assignments

0 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, all time — NPA 339

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 22

ONVOY, LLC - MA 18

PAETEC ITEL, LLC 11

MULTIPLE OCN LISTING 9

LEVEL 3 COMMUNICATIONS, LLC - MA 8

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
2012-02-17	339-201	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WEYMOUTH	MA
2011-11-01	339-202	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LEXINGTON	MA
2005-12-22	339-244	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	BRYANTVL	MA
2002-09-27	339-235	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BRAINTREE	MA
2002-09-27	339-236	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	HINGHAM	MA
2002-09-27	339-237	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	CANTON	MA
2002-09-18	339-203	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	WAKEFIELD	MA
2002-08-28	339-440	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	LYNN	MA
2002-07-09	339-221	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	MEDFORD	MA
2002-05-08	339-368	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	ARLINGTON	MA
2002-04-09	339-224	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	MALDEN	MA
2002-04-09	339-234	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BURLINGTON	MA
2002-03-08	339-226	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	REVERE	MA
2001-12-13	339-309	0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	KINGSTON	MA
2001-11-28	339-788	2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	ROCKLAND	MA
2001-11-13	339-298	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	METROPCS, INC.	5562	WOBURN	MA
2001-11-09	339-230	0–9 XXXall 10 · 5 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SHARON	MA
2001-09-27	339-927	9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WOBURN	MA
2001-09-13	339-793	2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	MARSHFIELD	MA
2001-09-11	339-214	0–9 XXXall 10 · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	NORWELL	MA
2001-08-10	339-933	4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BRYANTVL	MA
2001-07-06	339-223	4XXX5XXX6XXX7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	LEXINGTON	MA
2001-06-15	339-227	3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	WOBURN	MA
2001-05-29	339-545	1XXX3XXX5XXX6XXX7XXX · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	MEDFORD	MA
2001-05-10	339-222	3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	WALTHAM	MA
2001-05-10	339-364	2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	SHARON	MA
2001-05-10	339-987	2XXX3XXX4XXX5XXX6XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	RANDOLPH	MA
2001-05-01	339-337	1XXX3XXX5XXX6XXX7XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	COHASSET	MA
2001-05-01	339-469	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	COMCAST IP PHONE, LLC	318J	ROCKLAND	MA
2001-04-25	339-526	1XXX3XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	SCITUATE	MA
2001-04-24	339-225	3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NEEDHAM	MA
2001-04-24	339-832	4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	KINGSTON	MA
2001-04-19	339-219	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WAKEFIELD	MA
2001-03-20	339-200	7XXX8XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	HINGHAM	MA
2001-03-20	339-204	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	DEDHAM	MA
2001-03-20	339-206	8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	NORWOOD	MA
2001-03-20	339-502	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	CANTON	MA
2001-03-20	339-532	0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	REVERE	MA
2001-03-20	339-600	1XXX7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	SAUGUS	MA
2001-03-20	339-613	7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	NORWELL	MA
2001-03-20	339-674	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	PAETEC ITEL, LLC	829J	MEDFORD	MA
2001-03-20	339-686	7XXX8XXX9XXX which blocks →	PAETEC ITEL, LLC	829J	WELLESLEY	MA
2001-03-20	339-707	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	ARLINGTON	MA
2001-03-20	339-883	7XXX8XXX9XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	LYNN	MA
2001-03-20	339-970	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	LEXINGTON	MA
2001-03-19	339-293	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	MELROSE	MA
2001-03-19	339-499	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	WEYMOUTH	MA
2001-03-19	339-645	0XXX4XXX5XXX7XXX9XXX · 3 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	WOBURN	MA
—	339-205	0–9 XXXall 10 · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	WEYMOUTH	MA
—	339-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	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.