NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 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, last 30 days — NPA 959
ONVOY, LLC - CT 1
OMNIPOINT COMMUNICATIONS, INC. - CT 1
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
2016-11-16 959-282 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HARTFORD CT
2016-08-09 959-242 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 NORWICH CT
2016-06-29 959-209 0–9 XXXall 10 · 7 holders which blocks → CSC VOICE, LLC 612K WATERTOWN CT
2016-04-21 959-444 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILLIMNTIC CT
2015-07-15 959-929 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WILLIMNTIC CT
2015-03-27 959-299 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 HARTFORD CT
2015-01-27 959-777 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2015-01-27 959-888 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2014-10-03 959-999 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2014-09-18 959-200 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HARTFORD CT
— 959-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-213 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J NEW LONDON CT
— 959-230 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 HARTFORD CT
— 959-255 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
— 959-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST CT
— 959-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-700 not yet reported which blocks → CT
— 959-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX CT
— 959-950 not yet reported which blocks → CT
— 959-958 not yet reported which blocks → CT
— 959-959 not yet reported which blocks → CT
— 959-976 not yet reported which blocks → 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.