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
2021-02-12 959-952 0XXX1XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H SHARON CT
2020-12-07 959-217 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DEEP RIVER CT
2020-10-27 959-220 0XXX1XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - CT 639C ESSEX CT
2020-10-27 959-566 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CT 639C LEBANON CT
2020-10-14 959-895 0–9 XXXall 10 · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J HARTFORD CT
2020-09-14 959-876 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 HARTFORD CT
2020-07-29 959-977 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H WINSTED CT
2020-07-21 959-234 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H NORWICH CT
2020-07-21 959-345 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H DANIELSON CT
2020-07-21 959-356 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks → FRACTEL, LLC 965H HADDAM CT
2020-07-21 959-529 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H HARTFORD CT
2020-07-21 959-946 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H STAFFD SPG CT
2020-06-30 959-216 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F SOUTHINGTN CT
2020-06-18 959-881 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C NIANTIC CT
2020-06-12 959-251 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CT 639C CANTON CT
2020-06-12 959-271 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → ONVOY, LLC - CT 639C PAWCATUCK CT
2020-06-12 959-955 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CT 639C KILLINGWTH CT
2020-06-12 959-991 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - CT 639C CLINTON CT
2020-05-28 959-224 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LITCHFIELD CT
2020-05-28 959-301 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CT 639C COVENTRY CT
2020-05-28 959-949 0–9 XXXall 10 · 7 holders which blocks → ONVOY, LLC - CT 639C JEWETTCITY CT
2020-05-13 959-998 0XXX1XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LYME CT
2020-04-20 959-214 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WASHINGTON CT
2020-04-07 959-215 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW LONDON CT
2019-10-01 959-233 0–9 XXXwhole prefix which blocks → ONVOY, LLC - CT 639C ESSEX CT
2019-09-17 959-710 0–9 XXXall 10 · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H HARTFORD CT
2019-09-12 959-212 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWBRITAIN CT
2019-09-09 959-205 0–9 XXXall 10 · 7 holders which blocks → EXIANT COMMUNICATIONS LLC 114J HARTFORD CT
2019-07-15 959-300 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - CT 639C KENT CT
2019-07-15 959-400 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LAKEVILLE CT
2019-07-15 959-500 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C LEDYARD CT
2019-07-15 959-600 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C PLAINFIELD CT
2019-07-15 959-800 0XXX1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C THOMASTON CT
2019-07-15 959-901 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C TORRINGTON CT
2019-06-14 959-867 0–9 XXXall 10 · 4 holders which blocks → COMMIO, LLC 939H HARTFORD CT
2019-02-21 959-210 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F WILLIMNTIC CT
2019-02-12 959-245 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CT 639C NEWBRITAIN CT
2018-12-19 959-900 0–9 XXXall 10 · 7 holders which blocks → TERRA NOVA TELECOM INC. 145J HARTFORD CT
2018-12-06 959-206 0–9 XXXall 10 · 5 holders which blocks → VONAGE AMERICA LLC 197D HARTFORD CT
2018-09-26 959-207 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F COLCHESTER CT
2018-07-06 959-204 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2018-06-01 959-456 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F CANTERBURY CT
2018-05-31 959-201 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 NEW LONDON CT
2017-10-20 959-208 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEWBRITAIN CT
2017-10-03 959-666 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C HARTFORD CT
2017-07-21 959-202 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 TORRINGTON CT
2017-05-10 959-265 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CT 639C ESSEX CT
2017-05-10 959-335 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - CT 639C NORFOLK CT
2017-02-28 959-222 0–9 XXXall 10 · 4 holders which blocks → TELNYX LLC 073H NEWBRITAIN CT
2017-02-24 959-333 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H HARTFORD 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.