NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 248
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 520
NEW CINGULAR WIRELESS PCS, LLC - IL 384
ONVOY, LLCV - MI 332
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 287
METROPCS, INC. 227
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
2014-09-05 248-550-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-09-02 248-308-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2014-09-02 248-309-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2014-09-02 248-598-6XXX 6000–6999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 AUBURN HTS MI
2014-08-22 248-206-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROYAL OAK MI
2014-08-22 248-785-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J W BLOOMFLD MI
2014-08-20 248-309-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2014-08-12 248-923-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C ROCHESTER MI
2014-08-07 248-378-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2014-08-07 248-788-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E W BLOOMFLD MI
2014-08-05 248-206-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROYAL OAK MI
2014-08-05 248-206-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ROYAL OAK MI
2014-08-05 248-294-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E PONTIAC MI
2014-08-05 248-301-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E COMMERCE MI
2014-08-05 248-308-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E NORTHVILLE MI
2014-08-05 248-509-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E TROY MI
2014-08-05 248-531-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOLLY MI
2014-08-05 248-550-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BIRMINGHAM MI
2014-08-05 248-564-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E AUBURN HTS MI
2014-08-05 248-923-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROCHESTER MI
2014-08-05 248-957-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FARMINGTON MI
2014-07-29 248-223-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L SOUTHFIELD MI
2014-07-25 248-308-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2014-07-23 248-606-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 AUBURN HTS MI
2014-07-21 248-221-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C PONTIAC MI
2014-07-16 248-564-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J AUBURN HTS MI
2014-07-16 248-817-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J TROY MI
2014-07-07 248-206-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ROYAL OAK MI
2014-07-01 248-480-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BIRMINGHAM MI
2014-06-30 248-717-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MILFDWH LK MI
2014-06-24 248-301-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J COMMERCE MI
2014-06-23 248-599-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DRAYTON PL MI
2014-06-20 248-550-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-06-20 248-550-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-06-20 248-550-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-06-13 248-308-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2014-06-13 248-433-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-06-12 248-301-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COMMERCE MI
2014-06-12 248-309-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C PONTIAC MI
2014-06-12 248-467-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOLLY MI
2014-06-12 248-929-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAKE ORION MI
2014-06-05 248-378-7XXX 7000–7999Assigned METROPCS, INC. 5562 NORTHVILLE MI
2014-05-28 248-327-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2014-05-27 248-622-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J PONTIAC MI
2014-05-27 248-717-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILFDWH LK MI
2014-05-21 248-606-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 AUBURN HTS MI
2014-05-21 248-717-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MILFDWH LK MI
2014-05-15 248-221-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2014-05-15 248-221-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 PONTIAC MI
2014-05-14 248-717-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MILFDWH LK MI

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.