NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

9 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 920
ONVOY, LLC - WI 4
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 2
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1
T-MOBILE USA, INC. 1
INTRADO 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
2011-11-14 920-541-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C JEFFERSON WI
2011-11-14 920-626-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS WI
2011-11-14 920-706-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C WINNECONNE WI
2011-11-14 920-859-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C OMRO WI
2011-11-11 920-618-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SURING WI
2011-11-11 920-709-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J JUNEAU WI
2011-11-08 920-785-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GREEN BAY WI
2011-11-02 920-896-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 RIPON WI
2011-11-01 920-659-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 APPLETON WI
2011-10-27 920-530-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GREEN BAY WI
2011-10-24 920-252-9XXX 9000–9999Assigned METROPCS, INC. 5562 OSHKOSH WI
2011-10-24 920-263-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 FONDDU LAC WI
2011-10-24 920-393-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 GREEN BAY WI
2011-10-24 920-453-8XXX 8000–8999Assigned METROPCS, INC. 5562 SHEBOYGAN WI
2011-10-24 920-652-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MANITOWOC WI
2011-10-14 920-532-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F WRIGHTSTN WI
2011-10-03 920-350-6XXX 6000–6999Assigned PEERLESS NETWORK OF WISCONSIN, LLC - WI 227F COLUMBUS WI
2011-09-30 920-903-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 APPLETON WI
2011-09-22 920-365-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F ALGOMA WI
2011-09-22 920-478-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F WATERLOO WI
2011-09-22 920-638-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FONDDU LAC WI
2011-09-22 920-903-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 APPLETON WI
2011-09-13 920-535-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F WASHIGTNIS WI
2011-09-09 920-557-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BEAVER DAM WI
2011-09-09 920-647-6XXX 6000–6999Assigned UNITED STATES CELLULAR - WI 6274 WAUTOMA WI
2011-09-02 920-363-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F BAILEYSHBR WI
2011-09-02 920-365-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F ALGOMA WI
2011-08-25 920-482-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 MANITOWOC WI
2011-08-22 920-395-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F SHEBOYGAN WI
2011-08-17 920-266-2XXX 2000–2999Assigned METROPCS, INC. 5562 FONDDU LAC WI
2011-08-03 920-472-1XXX 1000–1999Assigned METROPCS, INC. 5562 NEW LONDON WI
2011-08-03 920-636-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 APPLETON WI
2011-08-01 920-252-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F OSHKOSH WI
2011-08-01 920-940-3XXX 3000–3999Assigned METROPCS, INC. 5562 GREEN BAY WI
2011-08-01 920-940-4XXX 4000–4999Assigned METROPCS, INC. 5562 GREEN BAY WI
2011-07-21 920-595-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 SEYMOUR WI
2011-07-08 920-425-6XXX 6000–6999Assigned NET LEC, INC. 6183 DE PERE WI
2011-06-27 920-659-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 APPLETON WI
2011-06-27 920-843-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 APPLETON WI
2011-06-03 920-365-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 ALGOMA WI
2011-05-31 920-400-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 PLYMOUTH WI
2011-05-27 920-818-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K STURGEONBY WI
2011-05-24 920-370-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 GREEN BAY WI
2011-05-24 920-370-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 GREEN BAY WI
2011-05-24 920-796-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 WHITELAW WI
2011-05-23 920-341-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WI 007F CLYMAN WI
2011-05-20 920-239-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C WAUPUN WI
2011-05-20 920-386-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JUNEAU WI
2011-05-20 920-390-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WATERTOWN WI
2011-05-20 920-542-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FTATKINSON WI

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.