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 228

BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 66

NEW CINGULAR WIRELESS PCS, LLC - GA 26

PAETEC ITEL, LLC 25

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 20

ONVOY, LLC - MS 16

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
2018-06-04	228-260	0–9 XXXall 10 · 3 holders which blocks →	VONAGE AMERICA LLC	197D	BILOXI	MS
2018-05-08	228-300	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MS	719E	OCEAN SPG	MS
2018-03-02	228-400	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MS	719E	BILOXI	MS
2018-03-01	228-335	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - MS	719E	TANNERWLMS	MS
2017-04-21	228-900	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - MS	719E	TANNERWLMS	MS
2017-02-24	228-888	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	TELNYX LLC	073H	PEARLINGTN	MS
2016-12-21	228-256	0–9 XXXall 10 · 3 holders which blocks →	TELNYX LLC	073H	GULFPORT	MS
2015-03-05	228-325	0–9 XXXall 10 · 3 holders which blocks →	AIRUS, INC. - MS	459H	BILOXI	MS
2014-02-10	228-346	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	GULFPORT	MS
2014-01-21	228-351	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MS	4886	GULFPORT	MS
2012-08-21	228-231	0–9 XXXall 10 · 3 holders which blocks →	MCC TELEPHONY LLC	593K	BAYSTLOUIS	MS
2012-02-27	228-438	0–9 XXXall 10 · 2 holders which blocks →	LEVEL 3 TELECOM OF MISSISSIPPI, LLC - MS	220C	BILOXI	MS
2011-08-03	228-200	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	HURLEY	MS
2010-01-07	228-967	0–9 XXXall 10 · 2 holders which blocks →	AT&T ENTERPRISES, LLC	516C	BILOXI	MS
2008-10-03	228-331	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BILOXI	MS
2008-04-30	228-271	0–9 XXXall 10 · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA MS - LLC	458C	BILOXI	MS
2008-02-13	228-295	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	BILOXI	MS
2008-01-28	228-334	0–9 XXXall 10 · 5 holders which blocks →	CELLULAR SOUTH, INC.	6581	OCEAN SPG	MS
2007-07-18	228-687	0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks →	TELEPAK NETWORKS, INC. - MS	5278	GULFPORT	MS
2007-01-16	228-215	0–9 XXXall 10 · 5 holders which blocks →	ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC	6916	OCEAN SPG	MS
2007-01-16	228-226	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	METROPCS, INC.	5562	BAYSTLOUIS	MS
2006-05-11	228-287	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	BILOXI	MS
2006-04-17	228-376	0–9 XXXwhole prefix which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MS	5178	BILOXI	MS
2005-05-18	228-777	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	GULFPORT	MS
2005-04-26	228-707	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	PEARLINGTN	MS
2005-04-26	228-901	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	HURLEY	MS
2005-01-14	228-456	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	BILOXI	MS
2005-01-14	228-567	2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	PASCAGOULA	MS
2005-01-14	228-678	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	PAETEC ITEL, LLC	829J	GULFPORT	MS
2004-04-06	228-285	0–9 XXXall 10 · 5 holders which blocks →	AT&T - LOCAL	7421	MOSS POINT	MS
2004-03-26	228-224	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	GULFPORT	MS
2004-03-15	228-337	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	BILOXI	MS
2004-02-18	228-223	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - GA	6214	GULFPORT	MS
2003-10-30	228-237	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	VANCLEAVE	MS
2003-10-30	228-247	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	HURLEY	MS
2003-10-30	228-248	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	GULFPORT	MS
2003-10-30	228-258	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	PASCAGOULA	MS
2003-10-30	228-259	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	PEARLINGTN	MS
2003-10-30	228-266	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	OCEAN SPG	MS
2003-10-30	228-267	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	BILOXI	MS
2003-10-30	228-268	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	PASSCHRSTN	MS
2003-10-30	228-270	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	BAYSTLOUIS	MS
2003-10-30	228-272	not yet reported which blocks →	TELEPAK NETWORKS, INC. - MS	5278	MOSS POINT	MS
2003-09-02	228-265	0–9 XXXall 10 · 4 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	GULFPORT	MS
2003-06-17	228-234	not yet reported which blocks →	CELLULAR SOUTH, INC.	6581	GULFPORT	MS
2003-04-24	228-355	4XXX5XXX6XXX7XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS	6396	PASCAGOULA	MS
2003-04-14	228-257	none assigned yet which blocks →	METROPCS, INC.	5562	BILOXI	MS
2003-03-25	228-387	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL	9419	BILOXI	MS
2003-03-25	228-933	0XXX1XXX2XXX3XXX4XXX5XXX · 3 holders which blocks →	BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL	9419	PASCAGOULA	MS
2003-03-20	228-254	1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks →	ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC	6916	PASSCHRSTN	MS

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.