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
— 601-545 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-546 none assigned yet which blocks → BAY SPRINGS TEL. CO., INC. 0446 WALTERS MS
— 601-549 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 HATTIESBG MS
— 601-550 6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 HATTIESBG MS
— 601-553 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MERIDIAN MS
— 601-554 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST MS
— 601-556 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 XXXXXXXXXX MS
— 601-558 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-559 5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 JACKSON MS
— 601-560 0XXX1XXX8XXX which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E CANTON MS
— 601-561 7XXX which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E VICKSBURG MS
— 601-567 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MCCOMB MS
— 601-568 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MS 5178 PHILA MS
— 601-570 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-572 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JACKSON MS
— 601-573 not yet reported which blocks → CELLULAR SOUTH, INC. 6581 JACKSON MS
— 601-576 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JACKSON MS
— 601-577 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 LAUREL MS
— 601-578 not yet reported which blocks → TEC OF JACKSON, INC. - MS 3704 LAUREL MS
— 601-579 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-580 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 LAUREL MS
— 601-581 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MERIDIAN MS
— 601-582 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-583 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-584 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 HATTIESBG MS
— 601-587 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MONTICELLO MS
— 601-588 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 BEAUMONT MS
— 601-590 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 PICAYUNE MS
— 601-591 3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 BRANDON MS
— 601-592 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 JACKSON MS
— 601-593 not yet reported which blocks → MS
— 601-594 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON MS
— 601-595 4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 MERIDIAN MS
— 601-597 not yet reported which blocks → CELLULAR SOUTH, INC. 6581 NATCHEZ MS
— 601-598 not yet reported which blocks → FRANKLIN TELEPHONE COMPANY, LLC 0454 JANICE MS
— 601-599 not yet reported which blocks → COMCAST IP PHONE, LLC 318J HATTIESBG MS
— 601-602 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → PAETEC ITEL, LLC 829J HATTIESBG MS
— 601-603 2XXX3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MS 6396 MIZE MS
— 601-604 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERIDIAN MS
— 601-605 7XXX which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MADISON MS
— 601-606 not yet reported which blocks → CELLULAR SOUTH, INC. 6581 HATTIESBG MS
— 601-607 0XXX1XXX2XXX5XXX9XXX · 3 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MADISON MS
— 601-608 7XXX8XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J JACKSON MS
— 601-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX MS
— 601-613 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 JACKSON MS
— 601-616 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MERIDIAN MS
— 601-618 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 VICKSBURG MS
— 601-619 not yet reported which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 VICKSBURG MS
— 601-625 none assigned yet which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 FOREST 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.