NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 410
ONVOY, LLC - MD 2
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
2023-07-19 410-478-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-19 410-478-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2023-07-14 410-824-9XXX 9000–9999Assigned TELNYX LLC 073H WATERLO236 MD
2023-06-20 410-214-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 RISING SUN MD
2023-05-17 410-410-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-05-17 410-410-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H BALTIMORE MD
2023-01-30 410-214-7XXX 7000–7999Assigned BOOST SUBSCRIBERCO L.L.C. 490J RISING SUN MD
2022-09-21 410-604-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D STEVENSVL MD
2022-09-21 410-755-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WARWICK MD
2022-09-21 410-824-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WATERLO236 MD
2022-09-20 410-510-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D FORK MD
2022-07-25 410-220-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2022-07-25 410-564-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2022-07-06 410-348-6XXX 6000–6999Assigned TERRA NOVA TELECOM INC. 145J STILL POND MD
2022-04-29 410-648-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H GALENA MD
2022-03-17 410-210-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H GLENBURNIE MD
2022-03-17 410-210-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H GLENBURNIE MD
2022-03-11 410-286-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J NORTHBEACH MD
2021-12-08 410-317-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ARGRGBSNIS MD
2021-12-08 410-317-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ARGRGBSNIS MD
2021-10-13 410-334-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SALISBURY MD
2021-10-13 410-352-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BISHOPVL MD
2021-10-13 410-405-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H FORK MD
2021-10-13 410-405-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H FORK MD
2021-10-13 410-559-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H PIKESVILLE MD
2021-10-13 410-572-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SALISBURY MD
2021-10-13 410-660-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ELKRIDGE MD
2021-10-13 410-697-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H MILLERSVL MD
2021-10-13 410-753-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H PIKESVILLE MD
2021-10-13 410-753-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H PIKESVILLE MD
2021-10-13 410-936-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H SALISBURY MD
2021-10-13 410-968-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CRISFIELD MD
2021-10-07 410-871-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 WESTMINSTR MD
2021-10-06 410-869-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CATONSVL MD
2021-09-13 410-763-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 EASTON MD

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.