Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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

8X8, INC. 43

NEW CINGULAR WIRELESS PCS, LLC - DC 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
—	856-999	not yet reported which blocks →	VERIZON NEW JERSEY, INC.	9206	XXXXXXXXXX	NJ
—	857-211	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-223	none assigned yet which blocks →	PAETEC ITEL, LLC	829J	BOSTON	MA
—	857-229	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	NEWTON	MA
—	857-239	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - MA	892D	BOSTON	MA
—	857-246	0–9 XXXall 10 · 4 holders which blocks →	METROPCS, INC.	5562	BOSTON	MA
—	857-271	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MA	892D	DORCHESTER	MA
—	857-299	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MA	892D	BELMONT	MA
—	857-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-345	0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA	6387	HYDE PARK	MA
—	857-348	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BOSTON	MA
—	857-361	0–9 XXXall 10 · 7 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	BROOKLINE	MA
—	857-371	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MA	892D	WATERTOWN	MA
—	857-402	0–9 XXXall 10 · 4 holders which blocks →	HD CARRIER LLC	321J	EASTBOSTON	MA
—	857-411	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-412	0–9 XXXall 10 · 2 holders which blocks →	ONVOY, LLC - MA	892D	CAMBRIDGE	MA
—	857-414	0–9 XXXall 10 · 3 holders which blocks →	HD CARRIER LLC	321J	BRIGHTON	MA
—	857-432	not yet reported which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	BROOKLINE	MA
—	857-452	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	CHARLESTN	MA
—	857-504	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	BOSTON	MA
—	857-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-520	0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	ONVOY, LLC - MA	892D	HYDE PARK	MA
—	857-540	4XXX5XXX7XXX8XXX · 2 holders which blocks →	OMNIPOINT MIAMI E LICENSE, LLC	6889	BRIGHTON	MA
—	857-554	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	XXXXXXXXXX	MA
—	857-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	MA
—	857-576	1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MA	990E	BROOKLINE	MA
—	857-587	0–9 XXXall 10 · 2 holders which blocks →	HD CARRIER LLC	321J	DORCHESTER	MA
—	857-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-617	not yet reported which blocks →				MA
—	857-663	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - MA	892D	DORCHESTER	MA
—	857-700	not yet reported which blocks →				MA
—	857-706	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MA	4018	CAMBRIDGE	MA
—	857-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-814	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	XXXXXXXXXX	MA
—	857-900	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	XXXXXXXXXX	MA
—	857-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	MA
—	857-920	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	CAMBRIDGE	MA
—	857-931	not yet reported which blocks →	VERIZON NEW ENGLAND INC.	9102	BOSTON	MA
—	857-940	not yet reported which blocks →				MA
—	857-950	not yet reported which blocks →				MA
—	857-958	not yet reported which blocks →				MA
—	857-959	not yet reported which blocks →				MA
—	857-976	not yet reported which blocks →				MA
—	857-995	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - MA	892D	SOMERVILLE	MA
—	857-996	0–9 XXXwhole prefix which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	BOSTON	MA
—	857-997	1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	HD CARRIER LLC	321J	SOMERVILLE	MA
—	858-200	4XXX5XXX6XXX7XXX · 3 holders which blocks →	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LA JOLLA	CA
—	858-201	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SNDG MRMS	CA
—	858-202	5XXX6XXX · 2 holders which blocks →	PACIFIC BELL	9740	LA JOLLA	CA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.