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 508

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
2001-02-16	508-686	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	HOPKINTON	MA
2001-02-16	508-734	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WALPOLE	MA
2001-02-16	508-738	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	TAUNTON	MA
2001-02-14	508-963	none assigned yet which blocks →	METROPCS, INC.	5562	WORCESTER	MA
2001-02-14	508-989	none assigned yet which blocks →	METROPCS, INC.	5562	FALL RIVER	MA
—	508-200	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	XXXXXXXXXX	MA
—	508-201	not yet reported which blocks →				MA
—	508-202	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	FRAMINGHAM	MA
—	508-205	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	PAETEC ITEL, LLC	829J	EASTON	MA
—	508-208	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BROCKTON	MA
—	508-209	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	PLYMOUTH	MA
—	508-210	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	HOLDEN	MA
—	508-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	508-212	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ATTLEBORO	MA
—	508-213	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TC SYSTEMS, INC.	7135	WEBSTER	MA
—	508-214	0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	WELLFLEET	MA
—	508-215	4XXX6XXX7XXX8XXX9XXX which blocks →	TC SYSTEMS, INC.	7135	FRAMINGHAM	MA
—	508-216	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	TC SYSTEMS, INC.	7135	FOXBORO	MA
—	508-217	1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TC SYSTEMS, INC.	7135	BRIDGEWTR	MA
—	508-218	not yet reported which blocks →	NORFOLK COUNTY INTERNET, INC.	6083	NATICK	MA
—	508-219	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	EASTON	MA
—	508-220	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	XXXXXXXXXX	MA
—	508-221	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	NANTUCKET	MA
—	508-222	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	ATTLEBORO	MA
—	508-223	none assigned yet which blocks →	VERIZON NEW ENGLAND INC.	9102	ATTLEBORO	MA
—	508-224	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	PLYMOUTH	MA
—	508-226	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	ATTLEBORO	MA
—	508-227	not yet reported which blocks →				MA
—	508-228	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	NANTUCKET	MA
—	508-229	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	MARLBORO	MA
—	508-230	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	EASTON	MA
—	508-231	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	FRAMINGHAM	MA
—	508-232	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	METROPCS, INC.	5562	BROCKTON	MA
—	508-233	0XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	NATICK	MA
—	508-234	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	WHITINSVL	MA
—	508-235	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	FALL RIVER	MA
—	508-236	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	ATTLEBORO	MA
—	508-237	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	ORLEANS	MA
—	508-238	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	EASTON	MA
—	508-240	4XXX8XXX9XXX · 2 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	ORLEANS	MA
—	508-241	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	CHATHAM	MA
—	508-242	1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	MEDFIELD	MA
—	508-243	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	ATTLEBORO	MA
—	508-244	0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	TC SYSTEMS, INC.	7135	MILFORD	MA
—	508-245	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	BRIDGEWTR	MA
—	508-246	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ORLEANS	MA
—	508-247	0XXX1XXX4XXX6XXX7XXX8XXX · 5 holders which blocks →	VERIZON NEW ENGLAND INC.	9102	ORLEANS	MA
—	508-248	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	CHARLTON	MA
—	508-249	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	HOPKINTON	MA
—	508-251	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	COMCAST IP PHONE, LLC	318J	MARLBORO	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.