NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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 217
ONVOY, LLC 3
NEW CINGULAR WIRELESS PCS, LLC - IL 3
EXIANT COMMUNICATIONS LLC 3
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
2010-12-07 217-212-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C FITHIAN IL
2010-11-22 217-255-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-11-22 217-372-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-11-08 217-316-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 QUINCY IL
2010-11-03 217-689-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2010-10-20 217-481-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD IL
2010-10-20 217-592-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUINCY IL
2010-10-11 217-761-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2010-10-11 217-761-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2010-10-11 217-761-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2010-10-08 217-313-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 LITCHFIELD IL
2010-09-28 217-979-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-09-07 217-848-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2010-09-07 217-848-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2010-08-30 217-607-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-08-30 217-607-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-08-30 217-979-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMPAURBN IL
2010-08-26 217-358-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DECATUR IL
2010-08-24 217-602-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSONVL IL
2010-08-19 217-862-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2010-08-17 217-419-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMPAURBN IL
2010-08-16 217-816-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2010-08-13 217-931-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD IL
2010-08-03 217-693-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-08-03 217-693-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2010-08-03 217-735-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LINCOLN IL
2010-07-30 217-503-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SPRINGFLD IL
2010-07-28 217-264-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 PARIS IL
2010-07-08 217-615-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DECATUR IL
2010-07-07 217-693-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 CHAMPAURBN IL
2010-07-02 217-731-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CLINTON IL
2010-07-01 217-230-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F EDINBURG IL
2010-07-01 217-399-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F KINCAID IL
2010-07-01 217-507-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F STRASBURG IL
2010-07-01 217-512-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F CHARLESTON IL
2010-07-01 217-515-8XXX 8000–8999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F OAKLAND IL
2010-07-01 217-518-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ARCOLA IL
2010-07-01 217-536-7XXX 7000–7999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WATSON IL
2010-07-01 217-561-2XXX 2000–2999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TAYLORVL IL
2010-07-01 217-573-4XXX 4000–4999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F RAYMOND IL
2010-07-01 217-603-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ASHMORE IL
2010-07-01 217-657-0XXX 0000–0999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SIGEL IL
2010-07-01 217-661-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ATWOOD IL
2010-07-01 217-804-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F STEWARDSON IL
2010-07-01 217-810-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MARTINSVL IL
2010-07-01 217-813-6XXX 6000–6999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F TEUTOPOLIS IL
2010-07-01 217-881-9XXX 9000–9999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F SHUMWAY IL
2010-07-01 217-905-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F WINDSOR IL
2010-07-01 217-914-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F MORRISONVL IL
2010-07-01 217-928-1XXX 1000–1999Assigned MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL 846F ARTHUR IL

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.