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
2015-04-13 203-293-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2015-04-13 203-441-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WOLCOTT CT
2015-04-13 203-689-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2015-04-13 203-689-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2015-04-13 203-718-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2015-04-13 203-872-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2015-01-23 203-457-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GUILFORD CT
2015-01-12 203-872-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2014-12-29 203-447-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HUNTINGTON CT
2014-12-29 203-523-9XXX 9000–9999Assigned METROPCS, INC. 5562 NORWALK CT
2014-12-29 203-712-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2014-12-29 203-963-0XXX 0000–0999Assigned METROPCS, INC. 5562 NORWALK CT
2014-12-17 203-580-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BYRAM CT
2014-12-12 203-706-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-12-12 203-802-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-12-12 203-805-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WATERBURY CT
2014-11-25 203-514-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2014-11-25 203-694-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MERIDEN CT
2014-11-21 203-694-2XXX 2000–2999Assigned METROPCS, INC. 5562 MERIDEN CT
2014-11-20 203-963-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-11-11 203-391-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-11 203-428-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-11 203-443-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2014-11-11 203-541-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-11 203-544-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 GEORGETOWN CT
2014-11-11 203-602-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-11 203-957-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-11-11 203-957-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-11-11 203-961-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-07 203-518-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WATERBURY CT
2014-11-06 203-951-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F MILFORD CT
2014-11-05 203-642-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-11-05 203-817-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-05 203-829-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 NORWALK CT
2014-11-05 203-940-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-05 203-969-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-11-05 203-973-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-10-29 203-442-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NEW CANAAN CT
2014-10-27 203-635-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2014-10-27 203-635-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WESTPORT CT
2014-10-09 203-900-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2014-10-09 203-900-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GREENWICH CT
2014-10-09 203-908-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 BRIDGEPORT CT
2014-10-06 203-399-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J STAMFORD CT
2014-10-06 203-703-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-10-06 203-703-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-10-06 203-705-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-10-06 203-705-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 STAMFORD CT
2014-10-03 203-802-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WATERBURY CT
2014-10-03 203-900-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GREENWICH 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.