NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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, all time — NPA 443
ONVOY SPECTRUM, LLC 48
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
2026-08-04 443-305-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ARGRGBSNIS MD
2024-09-24 443-740-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2024-09-24 443-869-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2024-09-24 443-890-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2024-09-24 443-916-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2022-02-24 443-407-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DUNDALK MD
2022-02-17 443-592-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ELKRIDGE MD
2022-02-17 443-592-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ELKRIDGE MD
2022-01-14 443-483-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CARDIFF MD
2022-01-14 443-483-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CARDIFF MD
2022-01-12 443-781-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ARGRGBSNIS MD
2022-01-12 443-781-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ARGRGBSNIS MD
2022-01-07 443-748-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MILLERSVL MD
2022-01-05 443-515-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H CAMBRIDGE MD
2021-12-28 443-484-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H EDGEWOOD MD
2021-12-17 443-592-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ELKRIDGE MD
2021-12-17 443-592-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ELKRIDGE MD
2021-12-16 443-987-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BEL AIR MD
2021-10-27 443-485-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ELKTON MD
2021-10-27 443-485-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ELKTON MD
2021-10-27 443-543-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-10-27 443-709-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-10-27 443-899-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H WATERLO238 MD
2021-10-26 443-696-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H DUNDALK MD
2021-10-26 443-696-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DUNDALK MD
2021-10-22 443-448-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H DENTON MD
2021-08-11 443-590-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H REISTERSTN MD
2021-05-27 443-300-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SYKESVILLE MD
2021-05-27 443-899-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H WATERLO238 MD
2021-05-01 443-582-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CHURCHVL MD
2021-04-29 443-665-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H NANTICOKE MD
2021-04-27 443-575-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-04-27 443-709-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-04-24 443-426-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H RANDALLSTN MD
2021-04-23 443-343-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H MILLERSVL MD
2021-04-23 443-584-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CROFTON MD
2021-04-23 443-656-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H COLUMBIA MD
2021-04-23 443-673-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BRYNPKLNCM MD
2021-04-23 443-689-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H COCKEYSVL MD
2021-04-23 443-830-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CATONSVL MD
2021-01-27 443-228-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CHASE MD
2021-01-27 443-575-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-01-27 443-575-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-01-27 443-575-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H ARBUTUS MD
2021-01-27 443-581-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CHASE MD
2020-06-26 443-626-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H CHASE MD
2020-06-26 443-626-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CHASE MD
2020-06-26 443-626-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CHASE MD

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.