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 757
COMCAST IP PHONE, LLC 73
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
2018-05-10 757-978 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
2018-05-08 757-964 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
2018-05-07 757-937 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2017-09-21 757-960 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SMITHFIELD VA
2017-08-25 757-290 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON1 VA
2017-05-04 757-674 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN1 VA
2017-05-04 757-730 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2016-12-02 757-782 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN1 VA
2015-08-26 757-698 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON1 VA
2014-09-02 757-378 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J WILLIAMSBG VA
2011-02-09 757-690 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
2010-10-18 757-452 0–9 XXXall 10 · 2 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2009-08-25 757-542 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J SMITHFIELD VA
2008-08-08 757-352 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2007-10-31 757-252 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2007-10-31 757-795 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2007-07-13 757-842 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON1 VA
2007-07-13 757-983 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2006-12-04 757-383 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2006-10-19 757-501 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
2006-04-26 757-648 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2006-01-31 757-261 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON4 VA
2006-01-30 757-507 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON4 VA
2006-01-26 757-351 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2003-12-02 757-984 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J WILLIAMSBG VA
2003-09-18 757-388 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
2002-02-21 757-736 not yet reported which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
2001-01-18 757-659 1XXX6XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN4 VA
— 757-203 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON3 VA
— 757-204 1XXX2XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON6 VA
— 757-222 not yet reported which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-223 7XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN1 VA
— 757-224 2XXX3XXX5XXX6XXX8XXX which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
— 757-225 not yet reported which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN2 VA
— 757-226 0XXX1XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-227 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-228 0XXX2XXX4XXX6XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-233 9XXX which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-234 1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN3 VA
— 757-240 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN1 VA
— 757-263 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON4 VA
— 757-301 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON4 VA
— 757-321 not yet reported which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-327 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN1 VA
— 757-333 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA
— 757-337 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON3 VA
— 757-345 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J WILLIAMSBG VA
— 757-369 none assigned yet which blocks → COMCAST IP PHONE, LLC 318J NWPTNWSZN3 VA
— 757-410 3XXX4XXX5XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON1 VA
— 757-433 not yet reported which blocks → COMCAST IP PHONE, LLC 318J NRFOLKZON2 VA

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.