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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2006-04-29 601-874 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON MS
2006-04-17 601-336 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 HATTIESBG MS
2006-03-29 601-493 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NATCHEZ MS
2006-03-29 601-600 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MCCOMB MS
2006-03-14 601-530 0–9 XXXall 10 · 5 holders which blocks → CELLULAR SOUTH, INC. 6581 LUCEDALE MS
2006-03-08 601-500 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON MS
2006-01-04 601-822 2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 RALEIGH MS
2006-01-04 601-975 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MIZE MS
2005-12-08 601-213 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 JACKSON MS
2005-11-29 601-996 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 MCCOMB MS
2005-07-25 601-891 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J FLORENCE MS
2005-07-06 601-889 7XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 PICAYUNE MS
2005-06-17 601-851 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 TOOMSUBA MS
2005-06-17 601-869 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MAGNOLIA MS
2005-06-17 601-873 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OSYKA MS
2005-06-06 601-793 3XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 DE KALB MS
2005-06-06 601-806 3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 MONTICELLO MS
2005-06-06 601-841 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 GLOSTER MS
2005-06-06 601-890 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CENTREVL MS
2005-06-06 601-904 3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 ROXIE MS
2005-06-06 601-980 1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 LIBERTY MS
2005-05-26 601-846 3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 NVALAIRSTA MS
2005-05-26 601-908 3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 OBADIAH MS
2005-04-27 601-901 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → PAETEC ITEL, LLC 829J TAYLORSVL MS
2005-04-25 601-843 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 DUFFEE MS
2005-04-25 601-907 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 CROSSROADS MS
2005-03-28 601-333 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 FOREST MS
2005-03-28 601-548 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 GLOSTER MS
2005-03-28 601-662 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 DE KALB MS
2005-03-28 601-805 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 CENTREVL MS
2005-03-28 601-820 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 UNION MS
2005-03-28 601-836 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 PHILA MS
2005-03-28 601-865 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 WOODVILLE MS
2005-03-28 601-887 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 NEWTONHKRY MS
2005-03-28 601-905 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 PORTGIBSON MS
2005-03-28 601-972 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 LIBERTY MS
2005-03-10 601-840 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 ENTERPRISE MS
2005-03-10 601-962 3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 LAKE MS
2005-03-03 601-862 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
2005-02-08 601-827 0XXX1XXX2XXX3XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 TYLERTOWN MS
2005-02-08 601-921 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 COLLINS MS
2005-01-20 601-557 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 QUITMAN MS
2005-01-20 601-884 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SHUBUTA MS
2004-12-06 601-828 not yet reported which blocks → TELEPAK NETWORKS, INC. - MS 5278 ROXIE MS
2004-11-19 601-844 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BRIARWOOD MS
2004-11-19 601-963 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 BUCKATUNNA MS
2004-10-22 601-838 0XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 QUITMAN MS
2004-10-22 601-993 1XXX2XXX3XXX4XXX8XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 SHUBUTA MS
2004-09-01 601-204 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX MS
2004-09-01 601-220 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX 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.