NumberResearch Membership · Data 09/19/2026

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 601
BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 242
NEW CINGULAR WIRELESS PCS, LLC - GA 80
TELEPAK NETWORKS, INC. - MS 75
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 74
LEVEL 3 COMMUNICATIONS, LLC - MS 67
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2026-08-11 601-491 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERIDIAN MS
2026-07-29 601-457 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON MS
2026-06-18 601-388 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 TOOMSUBA MS
2024-04-18 601-769 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - MS 719E JACKSON MS
2024-01-05 601-205 0–9 XXXall 10 · 2 holders which blocks → ONVOY SPECTRUM, LLC 624H HATTIESBG MS
2023-07-20 601-330 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NATCHEZ MS
2023-06-15 601-830 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERIDIAN MS
2023-05-22 601-601 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H JACKSON MS
2022-07-25 601-612 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MS 719E MADISON MS
2022-07-15 601-524 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MS 719E JACKSON MS
2022-03-28 601-461 0–9 XXXall 10 · 3 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 VICKSBURG MS
2021-04-23 601-210 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - MS 719E JACKSON MS
2020-10-01 601-440 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NUSO, LLC 478J CROSSROADS MS
2020-08-21 601-915 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E WAYNESBORO MS
2020-07-31 601-816 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERIDIAN MS
2018-02-20 601-521 0–9 XXXall 10 · 3 holders which blocks → AIRUS, INC. - MS 459H MADISON MS
2016-10-24 601-967 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 BROOKHAVEN MS
2016-08-19 601-821 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → ONVOY, LLC - MS 719E NVALAIRSTA MS
2016-08-19 601-895 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - MS 719E OBADIAH MS
2016-07-27 601-419 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E COLUMBIA MS
2016-03-29 601-586 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MS 719E JACKSON MS
2015-06-23 601-860 0XXX1XXX4XXX6XXX7XXX9XXX · 6 holders which blocks → WINDSTREAM MISSISSIPPI, INC. 0453 PRENTISS MS
2015-06-23 601-893 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM MISSISSIPPI, INC. 0453 FLORENCE MS
2014-02-24 601-589 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E EDWARDS MS
2014-01-21 601-882 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MS 4886 JACKSON MS
2013-10-29 601-539 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C LYNVILLE MS
2013-08-14 601-203 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J JACKSON MS
2012-08-10 601-541 0–9 XXXall 10 · 3 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 FOREST MS
2011-08-16 601-640 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SEMINARY MS
2011-08-04 601-401 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E FLORA MS
2011-03-10 601-920 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 NATCHEZ MS
2010-06-08 601-715 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2010-06-01 601-496 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JACKSON MS
2010-05-24 601-514 0–9 XXXall 10 · 7 holders which blocks → MCC TELEPHONY LLC 593K LUCEDALE MS
2010-01-26 601-909 0–9 XXXall 10 · 6 holders which blocks → TELEPAK NETWORKS, INC. - MS 5278 HATTIESBG MS
2010-01-07 601-202 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C BOLTON MS
2010-01-06 601-439 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MAGEE MS
2009-10-27 601-345 0–9 XXXall 10 · 4 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 JACKSON MS
2009-07-01 601-875 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C CROSSROADS MS
2008-11-10 601-839 not yet reported which blocks → TEC OF JACKSON, INC. - MS 3704 ENTERPRISE MS
2007-11-02 601-350 not yet reported which blocks → COMCAST IP PHONE, LLC 318J NVALAIRSTA MS
2007-11-02 601-449 not yet reported which blocks → COMCAST IP PHONE, LLC 318J BRIARWOOD MS
2007-11-02 601-637 not yet reported which blocks → COMCAST IP PHONE, LLC 318J TOOMSUBA MS
2007-11-02 601-771 not yet reported which blocks → COMCAST IP PHONE, LLC 318J OBADIAH MS
2006-09-13 601-872 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 POPLARVL MS
2006-09-13 601-912 0–9 XXXall 10 · 8 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 RICHTON MS
2006-05-30 601-633 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLUMBIA MS
2006-05-25 601-900 0–9 XXXall 10 · 5 holders which blocks → TEC OF JACKSON, INC. - MS 3704 FOREST MS
2006-05-18 601-800 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TEC OF JACKSON, INC. - MS 3704 ELLISVILLE MS
2006-05-01 601-990 0–9 XXXall 10 · 5 holders which blocks → TEC OF JACKSON, INC. - MS 3704 BROOKHAVEN 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.