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 959
TON80 COMMUNICATIONS, LLC 27
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
2022-03-17 959-559 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MIDDLETOWN CT
2022-03-17 959-595 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTHINGTN CT
2022-02-28 959-288 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ENFIELD CT
2022-02-17 959-716 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEW LONDON CT
2022-02-04 959-283 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GLASTONBY CT
2022-02-04 959-799 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TORRINGTON CT
2022-01-27 959-759 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DEEP RIVER CT
2022-01-25 959-266 0XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PAWCATUCK CT
2022-01-25 959-922 0XXX1XXX2XXX3XXX4XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J E HAMPTON CT
2022-01-25 959-995 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WILLIMNTIC CT
2022-01-24 959-936 0XXX4XXX5XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LYME CT
2022-01-17 959-426 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J COVENTRY CT
2022-01-17 959-516 0XXX1XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KENT CT
2022-01-17 959-912 0XXX1XXX2XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CANTERBURY CT
2022-01-14 959-763 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DANIELSON CT
2022-01-14 959-788 5XXX7XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NOTHOMPSON CT
2022-01-13 959-466 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WASHINGTON CT
2022-01-13 959-675 3XXX5XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORFOLK CT
2022-01-13 959-866 0XXX2XXX3XXX5XXX6XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CANTON CT
2022-01-13 959-966 0XXX4XXX5XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKEVILLE CT
2022-01-10 959-588 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NIANTIC CT
2022-01-10 959-625 0XXX1XXX2XXX5XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLINTON CT
2022-01-10 959-746 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OLD SAYBRK CT
2022-01-10 959-916 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J THOMASTON CT
2022-01-10 959-933 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WINSTED CT
2022-01-07 959-832 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWBRITAIN CT
2021-04-14 959-837 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NORWICH CT

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.