NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 906
OPENTACT INC. 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
2013-01-25 906-667-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BESSEMER MI
2012-11-27 906-229-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WAKEFIELD MI
2012-11-27 906-259-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SALTSTMARI MI
2012-11-27 906-264-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARQUETTE MI
2012-11-27 906-285-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C IRONWOOD MI
2012-11-27 906-296-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKELINDEN MI
2012-11-27 906-448-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C IRON MT MI
2012-11-27 906-702-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ISHPEMING MI
2012-11-27 906-792-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C MENOMINEE MI
2012-11-27 906-825-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C GLADSTONE MI
2012-09-25 906-286-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MANISTIQUE MI
2012-09-21 906-281-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUGHTON MI
2012-09-19 906-231-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HOUGHTON MI
2012-09-19 906-259-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E SALTSTMARI MI
2012-09-19 906-291-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E NEWBERRY MI
2012-09-19 906-662-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MARQUETTE MI
2012-09-19 906-666-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L MARQUETTE MI
2012-09-19 906-875-5XXX 5000–5999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CRYSTALFLS MI
2012-06-25 906-273-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K MARQUETTE MI
2012-06-06 906-290-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MENOMINEE MI
2012-05-01 906-204-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ISHPEMING MI
2012-05-01 906-285-7XXX 7000–7999Assigned CHARTER IP ENABLED SERVICES, LLC 792K IRONWOOD MI
2012-03-28 906-828-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K IRON MT MI
2012-03-26 906-352-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MENOMINEE MI
2012-03-20 906-212-5XXX 5000–5999Assigned UPPER PENINSULA TELEPHONE COMPANY - MI 746G ESCANABA MI
2012-03-19 906-239-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON MT MI
2012-03-06 906-291-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEWBERRY MI
2012-03-06 906-292-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BREVORT MI
2012-03-06 906-298-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST IGNACE MI
2012-03-06 906-398-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ESCANABA MI
2012-03-06 906-586-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C CURTIS MI
2012-03-06 906-826-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C STEPHENSON MI
2012-03-06 906-875-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CRYSTALFLS MI
2012-03-06 906-934-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CALUMET MI
2012-01-26 906-448-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E IRON MT MI
2012-01-25 906-330-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C POWERS MI
2012-01-06 906-214-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 IRON RIVER MI
2011-12-08 906-369-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CALUMET MI
2011-09-28 906-259-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALTSTMARI MI
2011-09-23 906-792-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MENOMINEE MI
2011-08-03 906-430-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ST IGNACE MI
2011-07-29 906-231-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUGHTON MI
2011-06-16 906-398-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ESCANABA MI
2011-04-06 906-395-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BARAGA MI
2011-03-09 906-204-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ISHPEMING MI
2011-02-16 906-825-5XXX 5000–5999Assigned 123.NET, LLC 2550 GLADSTONE MI
2011-02-10 906-239-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IRON MT MI
2011-01-28 906-203-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALTSTMARI MI
2010-12-14 906-398-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ESCANABA MI
2010-11-30 906-352-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K MENOMINEE MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.