NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

9 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2005-11-30 920-327-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GREEN BAY WI
2005-11-30 920-933-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FONDDU LAC WI
2005-11-22 920-319-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BEAVER DAM WI
2005-11-10 920-573-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 OSHKOSH WI
2005-11-10 920-573-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI 6508 OSHKOSH WI
2005-11-10 920-632-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 DE PERE WI
2005-11-04 920-327-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GREEN BAY WI
2005-10-27 920-257-2XXX 2000–2999Assigned TDS METROCOM, LLC 520K APPLETON WI
2005-10-27 920-257-5XXX 5000–5999Assigned TDS METROCOM, LLC 520K APPLETON WI
2005-10-19 920-823-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K JACKSONPT WI
2005-10-19 920-854-3XXX 3000–3999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SISTER BAY WI
2005-10-18 920-363-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BAILEYSHBR WI
2005-10-18 920-868-5XXX 5000–5999Assigned CHARTER IP ENABLED SERVICES, LLC 792K EGG HARBOR WI
2005-10-17 920-526-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 GREENBUSH WI
2005-10-17 920-541-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 JEFFERSON WI
2005-10-17 920-876-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 ELKHART LK WI
2005-10-14 920-818-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K STURGEONBY WI
2005-09-30 920-371-5XXX 5000–5999Assigned METROPCS, INC. 5562 GREEN BAY WI
2005-09-28 920-447-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 RANDOMLAKE WI
2005-09-22 920-504-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K SEYMOUR WI
2005-09-20 920-544-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K GREEN BAY WI
2005-09-20 920-593-3XXX 3000–3999Assigned TDS METROCOM, LLC 520K GREEN BAY WI
2005-09-20 920-593-5XXX 5000–5999Assigned TDS METROCOM, LLC 520K GREEN BAY WI
2005-09-09 920-560-0XXX 0000–0999Assigned TDS METROCOM, LLC 520K APPLETON WI
2005-09-09 920-560-3XXX 3000–3999Assigned TDS METROCOM, LLC 520K APPLETON WI
2005-09-02 920-564-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K OOSTBURG WI
2005-08-31 920-268-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 APPLETON WI
2005-08-23 920-243-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 APPLETON WI
2005-08-23 920-252-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OSHKOSH WI
2005-08-22 920-449-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 PLYMOUTH WI
2005-08-22 920-545-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 WATERTOWN WI
2005-08-16 920-522-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CHILTON WI
2005-08-16 920-523-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 CASCADE WI
2005-08-16 920-524-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 BRILLION WI
2005-07-26 920-319-2XXX 2000–2999Assigned UNITED STATES CELLULAR - WI 6274 BEAVER DAM WI
2005-07-20 920-449-5XXX 5000–5999Assigned TWC IP ENABLED SERVICES, LLC 793K PLYMOUTH WI
2005-06-28 920-257-4XXX 4000–4999Assigned TWC IP ENABLED SERVICES, LLC 793K APPLETON WI
2005-06-09 920-482-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J MANITOWOC WI
2005-06-06 920-486-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2005-06-06 920-486-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 NEENAH WI
2005-05-31 920-238-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FONDDU LAC WI
2005-05-31 920-320-2XXX 2000–2999Assigned WISCONSIN BELL INC 9327 MANITOWOC WI
2005-05-31 920-320-3XXX 3000–3999Assigned WISCONSIN BELL INC 9327 MANITOWOC WI
2005-05-31 920-320-4XXX 4000–4999Assigned WISCONSIN BELL INC 9327 MANITOWOC WI
2005-05-31 920-320-5XXX 5000–5999Assigned WISCONSIN BELL INC 9327 MANITOWOC WI
2005-05-31 920-320-6XXX 6000–6999Assigned WISCONSIN BELL INC 9327 MANITOWOC WI
2005-05-31 920-320-8XXX 8000–8999Assigned WISCONSIN BELL INC 9327 MANITOWOC WI
2005-05-09 920-550-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WI 5489 SHEBOGNFLS WI
2005-04-14 920-532-9XXX 9000–9999Assigned TWC IP ENABLED SERVICES, LLC 793K WRIGHTSTN WI
2005-04-12 920-472-9XXX 9000–9999Assigned METROPCS, INC. 5562 NEW LONDON WI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.