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
2003-10-08 203-927-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2003-10-02 203-763-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-10-02 203-763-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-10-02 203-763-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-10-02 203-763-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-09-29 203-487-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2003-09-22 203-252-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 STAMFORD CT
2003-09-18 203-437-0XXX 0000–0999Assigned METROPCS, INC. 5562 WATERBURY CT
2003-09-18 203-437-1XXX 1000–1999Assigned METROPCS, INC. 5562 WATERBURY CT
2003-09-18 203-648-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2003-09-18 203-648-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2003-09-18 203-673-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2003-09-18 203-868-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-09-18 203-868-2XXX 2000–2999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-09-18 203-868-4XXX 4000–4999Assigned METROPCS, INC. 5562 NEW HAVEN CT
2003-09-10 203-285-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2003-09-10 203-285-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NEW HAVEN CT
2003-09-10 203-442-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NEW CANAAN CT
2003-09-10 203-716-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NEW CANAAN CT
2003-09-10 203-716-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NEW CANAAN CT
2003-09-09 203-273-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2003-09-09 203-313-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 DANBURY CT
2003-09-08 203-687-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2003-09-04 203-809-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2003-09-04 203-947-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2003-08-27 203-463-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SEYMOUR CT
2003-08-25 203-559-4XXX 4000–4999Assigned METROPCS, INC. 5562 DARIEN CT
2003-08-25 203-559-5XXX 5000–5999Assigned METROPCS, INC. 5562 DARIEN CT
2003-08-22 203-542-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J GREENWICH CT
2003-08-20 203-340-9XXX 9000–9999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 GREENWICH CT
2003-08-19 203-954-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 ANSONIDRBY CT
2003-08-13 203-409-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 OLDGRNWICH CT
2003-08-08 203-610-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2003-08-08 203-610-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 BRIDGEPORT CT
2003-08-08 203-687-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NEW HAVEN CT
2003-08-06 203-669-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-08-06 203-669-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-08-06 203-669-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 DARIEN CT
2003-08-06 203-692-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-08-06 203-692-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-08-06 203-692-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 FAIRFIELD CT
2003-08-06 203-716-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CT 7230 NEW CANAAN CT
2003-08-06 203-809-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 NEW HAVEN CT
2003-07-24 203-983-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J GREENWICH CT
2003-07-21 203-446-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 ANSONIDRBY CT
2003-07-21 203-490-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NAUGATUCK CT
2003-07-21 203-548-5XXX 5000–5999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2003-07-21 203-548-6XXX 6000–6999Assigned CABLEVISION LIGHTPATH, INC. - CT 4950 STAMFORD CT
2003-07-21 203-774-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WALLINGFD CT
2003-07-21 203-816-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 TRUMBULL 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.