NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
Clear Download CSV ↓
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 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.