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
2005-07-25 203-841-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2005-07-21 203-346-9XXX 9000–9999Assigned METROPCS, INC. 5562 WATERBURY CT
2005-07-19 203-224-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-07-19 203-428-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2005-07-18 203-803-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2005-07-18 203-889-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2005-07-11 203-951-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MILFORD CT
2005-06-28 203-296-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-06-24 203-880-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J TRUMBULL CT
2005-06-23 203-747-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2005-06-21 203-455-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-06-13 203-460-6XXX 6000–6999Assigned METROPCS, INC. 5562 DANBURY CT
2005-06-08 203-455-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-06-08 203-654-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2005-06-07 203-312-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2005-06-07 203-448-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2005-06-07 203-644-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2005-05-27 203-391-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2005-05-17 203-440-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MERIDEN CT
2005-05-13 203-455-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-13 203-612-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-13 203-615-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-13 203-673-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-13 203-683-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-13 203-870-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-13 203-923-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRIDGEPORT CT
2005-05-12 203-635-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WESTPORT CT
2005-05-10 203-604-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWALK CT
2005-05-10 203-841-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 WATERBURY CT
2005-05-09 203-644-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2005-05-02 203-465-2XXX 2000–2999Assigned METROPCS, INC. 5562 WATERBURY CT
2005-05-02 203-542-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH CT
2005-05-02 203-542-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH CT
2005-04-13 203-848-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2005-04-06 203-340-5XXX 5000–5999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2005-04-06 203-504-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2005-04-06 203-987-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH CT
2005-04-06 203-987-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH CT
2005-04-05 203-898-5XXX 5000–5999Assigned METROPCS, INC. 5562 DARIEN CT
2005-04-01 203-285-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2005-04-01 203-285-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW HAVEN CT
2005-03-28 203-813-3XXX 3000–3999Assigned CSC VOICE, LLC 612K BYRAM CT
2005-03-25 203-502-1XXX 1000–1999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2005-03-25 203-549-8XXX 8000–8999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2005-03-25 203-549-9XXX 9000–9999Assigned CSC VOICE, LLC 612K BRIDGEPORT CT
2005-03-25 203-673-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2005-03-25 203-889-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2005-03-24 203-714-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J NAUGATUCK CT
2005-03-15 203-508-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2005-03-15 203-809-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN 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.