NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 203
ONVOY, LLC - CT 5
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 thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2014-01-09 203-703-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-01-09 203-890-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F STAMFORD CT
2014-01-09 203-940-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-01-09 203-940-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-01-09 203-940-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-01-09 203-940-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-01-09 203-941-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2013-12-10 203-642-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-12-10 203-642-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-12-10 203-654-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2013-12-03 203-643-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BRANFORD CT
2013-11-22 203-998-4XXX 4000–4999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2013-11-21 203-818-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-11-21 203-818-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-11-21 203-818-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-11-19 203-900-5XXX 5000–5999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2013-11-14 203-290-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2013-11-11 203-666-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2013-11-11 203-666-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2013-11-08 203-780-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2013-11-08 203-904-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-11-08 203-904-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-10-30 203-262-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 WOODBURY CT
2013-10-30 203-666-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 BRIDGEPORT CT
2013-10-23 203-399-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-23 203-399-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-23 203-399-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-23 203-399-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-23 203-399-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-23 203-399-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-18 203-725-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2013-10-09 203-403-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 RIDGEFIELD CT
2013-10-09 203-957-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2013-10-09 203-970-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORWALK CT
2013-10-04 203-440-6XXX 6000–6999Assigned METROPCS, INC. 5562 MERIDEN CT
2013-10-04 203-440-7XXX 7000–7999Assigned METROPCS, INC. 5562 MERIDEN CT
2013-10-04 203-580-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C BYRAM CT
2013-10-04 203-717-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2013-10-01 203-914-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-01 203-914-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-01 203-914-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-10-01 203-914-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-09-27 203-628-3XXX 3000–3999Assigned METROPCS, INC. 5562 DANBURY CT
2013-09-27 203-666-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 BRIDGEPORT CT
2013-09-04 203-780-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NEW HAVEN CT
2013-09-04 203-957-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NORWALK CT
2013-08-30 203-780-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2013-08-15 203-990-3XXX 3000–3999Assigned CSC VOICE, LLC 612K OLDGRNWICH CT
2013-08-14 203-461-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2013-08-14 203-539-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.