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 860
COMCAST IP PHONE, LLC 26
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
2023-06-15 860-981 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J WATERTOWN CT
2014-12-15 860-937 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
2012-04-27 860-603 0–9 XXXall 10 · 8 holders which blocks → COMCAST IP PHONE, LLC 318J COLCHESTER CT
2012-04-23 860-310 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
— 860-206 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
— 860-216 7XXX8XXX which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
— 860-217 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J SIMSBURY CT
— 860-219 2XXX3XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J WINDSOR CT
— 860-370 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J WINDSORLKS CT
— 860-413 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SIMSBURY CT
— 860-426 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J SOUTHINGTN CT
— 860-430 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J GLASTONBY CT
— 860-432 6XXX8XXX · 2 holders which blocks → COMCAST IP PHONE, LLC 318J MANCHESTER CT
— 860-436 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
— 860-453 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J CANAAN CT
— 860-461 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
— 860-479 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PLAINVILLE CT
— 860-495 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → COMCAST IP PHONE, LLC 318J PAWCATUCK CT
— 860-519 2XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks → COMCAST IP PHONE, LLC 318J HARTFORD CT
— 860-530 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J COLUMBIA CT
— 860-698 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J ENFIELD CT
— 860-764 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J CANTON CT
— 860-792 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMCAST IP PHONE, LLC 318J PUTNAM CT
— 860-851 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J STAFFD SPG CT
— 860-858 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → COMCAST IP PHONE, LLC 318J ROCKVILLE CT
— 860-926 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J ROCKVILLE CT

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.