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
2016-09-12 217-610-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-09-12 217-610-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-09-12 217-610-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-09-12 217-610-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-09-12 217-610-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-09-09 217-298-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-09-09 217-402-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-09-09 217-480-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-09-09 217-480-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-09-09 217-954-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-09-02 217-298-8XXX 8000–8999Assigned METROPCS, INC. 5562 CHAMPAURBN IL
2016-09-02 217-464-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DECATUR IL
2016-09-02 217-685-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 SPRINGFLD IL
2016-09-01 217-577-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 QUINCY IL
2016-09-01 217-904-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMPAURBN IL
2016-08-29 217-828-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 LINCOLN IL
2016-08-23 217-205-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATTOON IL
2016-08-22 217-294-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 MATTOON IL
2016-08-19 217-402-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
2016-08-19 217-615-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DECATUR IL
2016-08-11 217-331-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 SPRINGFLD IL
2016-08-10 217-843-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 SPRINGFLD IL
2016-08-09 217-655-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DANVILLE IL
2016-07-26 217-200-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 CHAMPAURBN IL
2016-07-18 217-200-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHAMPAURBN IL
2016-07-13 217-697-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHATHAM IL
2016-07-08 217-464-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2016-07-08 217-542-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2016-07-08 217-542-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2016-07-08 217-542-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2016-07-08 217-718-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-07-08 217-718-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SPRINGFLD IL
2016-07-07 217-200-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-07-07 217-200-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-07-07 217-200-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-07-07 217-200-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-07-07 217-200-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CHAMPAURBN IL
2016-06-21 217-970-1XXX 1000–1999Assigned IP HORIZON LLC 515J SPRINGFLD IL
2016-06-21 217-991-1XXX 1000–1999Assigned IP HORIZON LLC 515J CHAMPAURBN IL
2016-06-20 217-849-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 TOLEDO IL
2016-06-07 217-506-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 7196 QUINCY IL
2016-05-31 217-240-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EFFINGHAM IL
2016-05-26 217-240-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IL 7136 EFFINGHAM IL
2016-05-24 217-536-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WATSON IL
2016-05-24 217-601-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GEORGETOWN IL
2016-05-23 217-775-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 DECATUR IL
2016-05-20 217-730-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINCHESTER IL
2016-05-13 217-207-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ST JOSEPH IL
2016-05-13 217-288-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SIDELL IL
2016-05-13 217-387-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J THAWVILLE 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.