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
2020-09-30 443-724-7XXX 7000–7999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G EASTON MD
2020-09-29 443-335-6XXX 6000–6999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G BRYNPKLNCM MD
2020-09-24 443-209-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HAVREGRACE MD
2020-09-17 443-233-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D VIENNA MD
2020-09-17 443-598-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D SHERWD FOR MD
2020-09-11 443-456-1XXX 1000–1999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2020-09-03 443-242-5XXX 5000–5999Assigned METROPCS, INC. 5562 SPARROWSPT MD
2020-09-01 443-318-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COCKEYSVL MD
2020-09-01 443-595-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F SPARKSGLNC MD
2020-08-30 443-225-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 CAMBRIDGE MD
2020-08-27 443-788-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-08-27 443-788-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-08-24 443-675-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 RANDALLSTN MD
2020-08-18 443-989-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLENBURNIE MD
2020-08-13 443-332-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F CROFTON MD
2020-08-13 443-495-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PARKVILLE MD
2020-08-13 443-599-5XXX 5000–5999Assigned METROPCS, INC. 5562 SEVERN MD
2020-08-13 443-650-4XXX 4000–4999Assigned METROPCS, INC. 5562 REISTERSTN MD
2020-08-13 443-940-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PIKESVILLE MD
2020-08-06 443-834-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 TOWSON MD
2020-08-05 443-318-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COCKEYSVL MD
2020-07-28 443-704-9XXX 9000–9999Assigned PEERLESS NETWORK OF MARYLAND, LLC 568G ODENTON MD
2020-07-28 443-772-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ESSEX MD
2020-07-28 443-772-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ESSEX MD
2020-07-14 443-233-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D VIENNA MD
2020-07-14 443-233-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D VIENNA MD
2020-07-14 443-319-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F COLUMBIA MD
2020-07-14 443-513-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D BERLIN MD
2020-07-14 443-664-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D OCEAN CITY MD
2020-07-14 443-716-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F ANNAPOLIS MD
2020-07-14 443-901-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D TOWSON MD
2020-07-14 443-901-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D TOWSON MD
2020-07-14 443-901-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D TOWSON MD
2020-06-30 443-491-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 7228 PARKTON 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
2020-06-24 443-989-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 GLENBURNIE MD
2020-06-18 443-901-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 TOWSON MD
2020-06-16 443-318-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MD 6119 COCKEYSVL MD
2020-06-16 443-512-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 EDGEWOOD MD
2020-06-12 443-374-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-06-12 443-374-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-06-12 443-374-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-06-12 443-788-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ABERDEEN MD
2020-06-04 443-232-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D WILLARDS MD
2020-06-04 443-232-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D WILLARDS MD
2020-06-04 443-323-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D SHARPTOWN MD
2020-06-04 443-323-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D SHARPTOWN MD
2020-06-04 443-884-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F BALTIMORE 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.