NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

14 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 810
NEW CINGULAR WIRELESS PCS, LLC - IL 13
EXIANT COMMUNICATIONS LLC 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
2013-10-08 810-224-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 BRIGHTON MI
2013-10-08 810-350-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MONTROSE MI
2013-10-08 810-634-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 NEWLOTHROP MI
2013-10-08 810-797-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 HADLEY MI
2013-09-27 810-221-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G FLINT MI
2013-09-10 810-228-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J FLINT MI
2013-08-14 810-603-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GRANDBLANC MI
2013-07-29 810-652-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K DAVISON MI
2013-07-12 810-212-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 METAMORA MI
2013-06-24 810-328-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ST CLAIR MI
2013-06-24 810-522-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MI
2013-06-20 810-216-0XXX 0000–0999Assigned TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-20 810-216-1XXX 1000–1999Assigned TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-20 810-216-2XXX 2000–2999Assigned TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-20 810-216-3XXX 3000–3999Assigned TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-20 810-216-4XXX 4000–4999Assigned TELNET WORLDWIDE, INC. 817J PORT HURON MI
2013-06-17 810-259-3XXX 3000–3999Assigned METROPCS, INC. 5562 FLINT MI
2013-06-17 810-259-4XXX 4000–4999Assigned METROPCS, INC. 5562 FLINT MI
2013-06-06 810-866-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J GRANDBLANC MI
2013-05-29 810-259-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C FLINT MI
2013-05-22 810-662-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E PORT HURON MI
2013-05-15 810-222-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 BRIGHTON MI
2013-05-07 810-224-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRIGHTON MI
2013-04-19 810-605-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 FLUSHING MI
2013-03-11 810-269-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SANDUSKY MI
2013-03-06 810-493-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2013-03-06 810-493-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 FLINT MI
2013-03-06 810-772-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 BRIGHTON MI
2013-02-27 810-844-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BRIGHTON MI
2013-02-22 810-652-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DAVISON MI
2013-02-22 810-746-1XXX 1000–1999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L HARTLAND MI
2013-02-14 810-258-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C RANKIN MI
2013-02-14 810-270-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C NORTH BRCH MI
2013-02-14 810-327-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C JEDDO MI
2013-02-14 810-535-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MEMPHIS MI
2013-02-14 810-627-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C IMLAY CITY MI
2013-02-14 810-631-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C OTISVILLE MI
2013-02-14 810-642-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C SMITHS CRK MI
2013-02-14 810-644-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C SWARTZ CRK MI
2013-02-14 810-678-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C METAMORA MI
2013-02-14 810-788-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C YALE MI
2013-02-14 810-957-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C LINDEN MI
2013-02-13 810-325-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C GOODELLS MI
2013-02-13 810-366-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C DECKERVL MI
2013-02-13 810-371-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CAPAC MI
2013-02-13 810-375-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DRYDEN MI
2013-02-13 810-474-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C AVOCA MI
2013-02-13 810-475-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BROWN CITY MI
2013-02-13 810-545-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C COLUMBIAVL MI
2013-02-13 810-673-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ALMONT 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.