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
2021-10-13 203-633-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H WOLCOTT CT
2021-10-13 203-664-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H REDDING CT
2021-10-13 203-704-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H WOLCOTT CT
2021-10-13 203-704-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H WOLCOTT CT
2021-10-13 203-714-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H NAUGATUCK CT
2021-10-13 203-716-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H NEW CANAAN CT
2021-10-13 203-884-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H GUILFORD CT
2021-10-13 203-930-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H GREENWICH CT
2021-10-06 203-935-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 MERIDEN CT
2021-09-29 203-649-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2021-09-29 203-714-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F NAUGATUCK CT
2021-09-28 203-244-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J RIDGEFIELD CT
2021-08-16 203-971-4XXX 4000–4999Assigned BARR TEL USA, INC. - CT 866H GREENWICH CT
2021-08-10 203-628-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 DANBURY CT
2021-07-21 203-664-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C REDDING CT
2021-07-21 203-664-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C REDDING CT
2021-07-12 203-298-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-07-12 203-298-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-07-12 203-298-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-07-12 203-298-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C NEW HAVEN CT
2021-06-15 203-242-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HUNTINGTON CT
2021-06-04 203-283-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-06-03 203-971-0XXX 0000–0999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-03 203-971-1XXX 1000–1999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-03 203-971-2XXX 2000–2999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-06-03 203-971-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C GREENWICH CT
2021-05-05 203-713-9XXX 9000–9999Assigned ONVOY, LLC - CT 639C MILFORD CT
2021-03-02 203-646-2XXX 2000–2999Assigned TWILIO INTERNATIONAL, INC. 506J BRANFORD CT
2021-02-22 203-896-5XXX 5000–5999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2021-02-10 203-379-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MERIDEN CT
2021-02-10 203-646-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BRANFORD CT
2021-02-10 203-669-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DARIEN CT
2021-02-10 203-692-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H FAIRFIELD CT
2021-02-02 203-646-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2021-02-02 203-660-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C BYRAM CT
2021-01-25 203-716-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H NEW CANAAN CT
2021-01-25 203-884-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H GUILFORD CT
2021-01-25 203-884-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H GUILFORD CT
2020-11-13 203-793-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J WALLINGFD CT
2020-10-23 203-646-3XXX 3000–3999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2020-10-23 203-646-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2020-10-23 203-713-5XXX 5000–5999Assigned ONVOY, LLC - CT 639C MILFORD CT
2020-10-23 203-718-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2020-10-23 203-718-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CT 199F CHESHIRE CT
2020-10-23 203-793-4XXX 4000–4999Assigned ONVOY, LLC - CT 639C WALLINGFD CT
2020-09-25 203-896-4XXX 4000–4999Assigned PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F MADISON CT
2020-09-24 203-793-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WALLINGFD CT
2020-06-05 203-350-7XXX 7000–7999Assigned ONVOY, LLC - CT 639C MADISON CT
2020-06-05 203-433-6XXX 6000–6999Assigned ONVOY, LLC - CT 639C BRANFORD CT
2019-07-16 203-601-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS, INC. - CT 6624 TRUMBULL 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.