NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 443
ONVOY, LLC - MD 8
NEW CINGULAR WIRELESS PCS, LLC - DC 4
VERSATEL LLC 1
OPENTACT INC. 1
LEVEL 3 COMMUNICATIONS, LLC - MD 1
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
2016-02-23 443-291-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D HAMPSTEAD MD
2016-02-23 443-590-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D REISTERSTN MD
2016-02-23 443-590-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D REISTERSTN MD
2016-02-23 443-881-0XXX 0000–0999Assigned METROPCS, INC. 5562 REISTERSTN MD
2016-02-23 443-881-5XXX 5000–5999Assigned METROPCS, INC. 5562 REISTERSTN MD
2016-02-23 443-967-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D NORTH EAST MD
2016-02-23 443-967-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D NORTH EAST MD
2016-02-22 443-737-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D WATERLO238 MD
2016-02-22 443-737-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D WATERLO238 MD
2016-02-22 443-754-8XXX 8000–8999Assigned METROPCS, INC. 5562 SALISBURY MD
2016-02-22 443-754-9XXX 9000–9999Assigned METROPCS, INC. 5562 SALISBURY MD
2016-02-22 443-922-5XXX 5000–5999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2016-02-22 443-922-6XXX 6000–6999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2016-02-22 443-922-8XXX 8000–8999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2016-02-22 443-941-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 ELKTON MD
2016-02-19 443-234-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 SNOW HILL MD
2016-02-19 443-339-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D SHERWD FOR MD
2016-02-19 443-339-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D SHERWD FOR MD
2016-02-18 443-227-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D PT DEPOSIT MD
2016-02-18 443-227-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D PT DEPOSIT MD
2016-02-18 443-647-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D NEWWINDSOR MD
2016-02-18 443-647-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D NEWWINDSOR MD
2016-02-17 443-576-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D RANDALLSTN MD
2016-02-17 443-576-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D RANDALLSTN MD
2016-02-16 443-347-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D CARDIFF MD
2016-02-16 443-347-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D CARDIFF MD
2016-02-15 443-589-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D COCKEYSVL MD
2016-02-15 443-589-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D COCKEYSVL MD
2016-02-15 443-663-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D WOODLAWN MD
2016-02-15 443-663-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D WOODLAWN MD
2016-02-12 443-666-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHESTERTN MD
2016-02-12 443-796-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 PIKESVILLE MD
2016-02-11 443-244-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D WESTMINSTR MD
2016-02-11 443-952-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WESTMINSTR MD
2016-02-11 443-978-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SALISBURY MD
2016-02-10 443-486-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D PRINCEFRCK MD
2016-02-10 443-486-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D PRINCEFRCK MD
2016-02-03 443-545-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D COLUMBIA MD
2016-02-03 443-583-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D COLUMBIA MD
2016-02-02 443-557-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D GLENBURNIE MD
2016-02-02 443-572-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D GLENBURNIE MD
2016-01-26 443-214-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D ANNAPOLIS MD
2016-01-26 443-720-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D ABERDEEN MD
2016-01-26 443-775-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D ANNAPOLIS MD
2016-01-25 443-593-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 ELKTON MD
2016-01-15 443-898-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PIKESVILLE MD
2016-01-14 443-779-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2016-01-11 443-325-6XXX 6000–6999Assigned METROPCS, INC. 5562 ELLICOTTCY MD
2016-01-07 443-371-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BEL AIR MD
2016-01-07 443-763-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE 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.