NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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
2006-03-22 203-296-1XXX 1000–1999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-03-22 203-296-2XXX 2000–2999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-03-22 203-296-9XXX 9000–9999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-03-22 203-540-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2006-03-22 203-872-3XXX 3000–3999Assigned SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT 9147 CHESHIRE CT
2006-03-21 203-540-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2006-03-21 203-706-3XXX 3000–3999Assigned METROPCS, INC. 5562 WATERBURY CT
2006-03-17 203-793-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WALLINGFD CT
2006-03-16 203-540-5XXX 5000–5999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-03-16 203-870-4XXX 4000–4999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-03-15 203-712-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUNTINGTON CT
2006-03-13 203-383-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2006-03-13 203-404-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2006-03-13 203-815-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2006-03-13 203-815-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2006-03-13 203-815-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2006-03-13 203-859-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEW HAVEN CT
2006-03-09 203-626-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J WALLINGFD CT
2006-03-03 203-479-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2006-02-23 203-947-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DANBURY CT
2006-02-16 203-298-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2006-02-16 203-492-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2006-02-16 203-654-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2006-02-16 203-814-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2006-02-15 203-244-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RIDGEFIELD CT
2006-02-15 203-346-8XXX 8000–8999Assigned METROPCS, INC. 5562 WATERBURY CT
2006-02-15 203-651-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CHESHIRE CT
2006-02-09 203-540-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2006-02-09 203-540-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2006-02-07 203-513-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HUNTINGTON CT
2006-02-06 203-362-5XXX 5000–5999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-02-06 203-669-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J DARIEN CT
2006-02-06 203-923-1XXX 1000–1999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2006-01-23 203-340-8XXX 8000–8999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2006-01-23 203-568-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2006-01-20 203-712-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUNTINGTON CT
2006-01-19 203-379-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MERIDEN CT
2006-01-11 203-205-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 DANBURY CT
2006-01-06 203-448-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2006-01-06 203-448-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2006-01-06 203-504-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2006-01-06 203-598-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 WATERBURY CT
2006-01-06 203-814-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2006-01-06 203-814-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2006-01-06 203-815-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2006-01-06 203-815-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2006-01-06 203-947-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2006-01-06 203-947-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2006-01-06 203-953-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2006-01-05 203-803-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.