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
2014-09-03 443-339-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D SHERWD FOR MD
2014-09-03 443-339-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D SHERWD FOR MD
2014-09-03 443-776-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2014-09-03 443-776-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D ELKRIDGE MD
2014-09-03 443-818-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ARGRGBSNIS MD
2014-09-03 443-818-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ARGRGBSNIS MD
2014-09-02 443-256-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NORTH EAST MD
2014-09-02 443-280-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 SYKESVILLE MD
2014-09-02 443-583-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J COLUMBIA MD
2014-08-28 443-273-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J REISTERSTN MD
2014-08-28 443-505-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ESSEX MD
2014-08-28 443-593-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKTON MD
2014-08-27 443-256-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D NORTH EAST MD
2014-08-27 443-256-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D NORTH EAST MD
2014-08-26 443-585-8XXX 8000–8999Assigned ONVOY, LLC - MD 876D DARLINGTON MD
2014-08-26 443-585-9XXX 9000–9999Assigned ONVOY, LLC - MD 876D DARLINGTON MD
2014-08-22 443-653-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PARKVILLE MD
2014-08-22 443-713-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-08-22 443-713-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-08-22 443-713-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 GLENBURNIE MD
2014-08-22 443-985-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 RANDALLSTN MD
2014-08-21 443-787-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BEL AIR MD
2014-08-20 443-342-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D SOLOMONS MD
2014-08-19 443-409-4XXX 4000–4999Assigned METROPCS, INC. 5562 EDGEWOOD MD
2014-08-11 443-251-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CATONSVL MD
2014-08-08 443-734-1XXX 1000–1999Assigned ONVOY, LLC - MD 876D SEVERN MD
2014-08-08 443-898-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D PIKESVILLE MD
2014-08-07 443-251-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D CATONSVL MD
2014-08-07 443-512-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D EDGEWOOD MD
2014-08-07 443-572-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D GLENBURNIE MD
2014-08-07 443-770-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D ARGRGBSNIS MD
2014-08-07 443-787-3XXX 3000–3999Assigned ONVOY, LLC - MD 876D BEL AIR MD
2014-08-07 443-868-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D ESSEX MD
2014-08-07 443-879-2XXX 2000–2999Assigned ONVOY, LLC - MD 876D DUNDALK MD
2014-08-07 443-952-6XXX 6000–6999Assigned ONVOY, LLC - MD 876D WESTMINSTR MD
2014-08-07 443-973-4XXX 4000–4999Assigned ONVOY, LLC - MD 876D ELLICOTTCY MD
2014-08-06 443-583-5XXX 5000–5999Assigned ONVOY, LLC - MD 876D COLUMBIA MD
2014-08-06 443-678-0XXX 0000–0999Assigned ONVOY, LLC - MD 876D PARKVILLE MD
2014-08-06 443-720-7XXX 7000–7999Assigned ONVOY, LLC - MD 876D ABERDEEN MD
2014-08-06 443-738-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PIKESVILLE MD
2014-08-06 443-738-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MD 071F PIKESVILLE MD
2014-07-31 443-808-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ANNAPOLIS MD
2014-07-25 443-818-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ARGRGBSNIS MD
2014-07-25 443-818-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ARGRGBSNIS MD
2014-07-23 443-522-6XXX 6000–6999Assigned METROPCS, INC. 5562 REISTERSTN MD
2014-07-23 443-522-7XXX 7000–7999Assigned METROPCS, INC. 5562 REISTERSTN MD
2014-07-21 443-776-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKRIDGE MD
2014-07-18 443-272-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RANDALLSTN MD
2014-07-08 443-741-7XXX 7000–7999Assigned METROPCS, INC. 5562 COLUMBIA MD
2014-06-27 443-607-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WEST RIVER 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.