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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2019-07-11 203-350-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C MADISON CT
2019-01-31 203-204-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-204-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-204-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-204-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-457-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-457-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-463-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C SEYMOUR CT
2019-01-31 203-533-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2019-01-31 203-813-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C BYRAM CT
2019-01-31 203-884-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2018-09-20 203-457-3XXX 3000–3999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F GUILFORD CT
2018-09-19 203-626-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2018-04-20 203-303-9XXX 9000–9999Assigned TELNYX LLC 073H WALLINGFD CT
2018-04-20 203-720-6XXX 6000–6999Assigned TELNYX LLC 073H NAUGATUCK CT
2018-04-20 203-884-8XXX 8000–8999Assigned TELNYX LLC 073H GUILFORD CT
2018-02-06 203-717-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2018-02-06 203-717-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2017-10-02 203-806-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J CHESHIRE CT
2017-09-13 203-439-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2017-08-21 203-303-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WALLINGFD CT
2017-02-03 203-793-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 WALLINGFD CT
2016-12-01 203-390-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CT 7143 NEW HAVEN CT
2016-11-14 203-408-9XXX 9000–9999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F REDDING CT
2016-10-03 203-717-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2016-07-12 203-439-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2016-07-12 203-439-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2016-06-20 203-678-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F WALLINGFD CT
2016-06-17 203-664-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F REDDING CT
2016-06-14 203-439-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2016-06-14 203-884-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F GUILFORD CT
2016-05-18 203-586-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WOODBURY CT
2016-04-19 203-496-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2016-04-19 203-496-8XXX 8000–8999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2016-04-18 203-408-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C REDDING CT
2016-04-18 203-774-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2016-04-18 203-872-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2016-03-29 203-429-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2016-03-25 203-738-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2016-03-25 203-813-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C BYRAM CT
2016-03-25 203-884-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C GUILFORD CT
2016-02-26 203-408-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C REDDING CT
2016-02-18 203-514-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2016-02-10 203-806-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2016-02-10 203-806-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2016-01-25 203-349-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C WESTPORT CT
2016-01-25 203-793-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2016-01-25 203-872-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C CHESHIRE CT
2016-01-19 203-496-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2016-01-14 203-769-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C GREENWICH 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.