NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 217
LEVEL 3 COMMUNICATIONS, LLC - IL 203
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
2025-01-30 217-515-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OAKLAND IL
2024-08-22 217-960-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2024-05-29 217-986-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2023-11-28 217-318-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2023-10-10 217-843-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2022-12-27 217-914-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MORRISONVL IL
2022-11-21 217-813-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TEUTOPOLIS IL
2022-10-12 217-318-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2022-10-12 217-843-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2022-09-06 217-457-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CONCORD IL
2022-06-07 217-970-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2022-04-04 217-999-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOUNTOLIVE IL
2022-03-21 217-456-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NEWDOUGLAS IL
2022-03-16 217-835-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BENLD IL
2021-09-16 217-991-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2021-08-24 217-651-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LINCOLN IL
2021-08-24 217-707-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 TAYLORVL IL
2021-08-16 217-609-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CASEY IL
2021-03-31 217-689-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2021-03-31 217-977-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DANVILLE IL
2020-07-14 217-318-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CHAMPAURBN IL
2020-06-03 217-742-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WINCHESTER IL
2020-05-12 217-606-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SPRINGFLD IL
2020-05-04 217-551-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HAMILTON IL
2020-04-09 217-219-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARTHAGE IL
2020-01-14 217-209-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 QUINCY IL
2019-11-19 217-500-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 EFFINGHAM IL
2019-09-18 217-906-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BUFFALO IL
2019-06-17 217-295-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MATTOON IL
2019-06-10 217-628-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 DIVERNON IL
2019-06-10 217-992-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MOWEAQUA IL
2019-02-12 217-334-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 COLUMBUS IL
2018-05-29 217-997-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARENZVILLE IL
2018-03-23 217-209-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 QUINCY IL
2018-03-07 217-216-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RUSHVILLE IL
2018-02-07 217-247-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RIDGE FARM IL
2017-09-19 217-207-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ST JOSEPH IL
2017-09-07 217-312-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 OWANECO IL
2017-09-07 217-315-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 WITT IL
2017-08-29 217-773-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 MTSTERLING IL
2017-08-29 217-833-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GRIGGSVL IL
2017-08-24 217-309-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 FARMERSVL IL
2017-08-21 217-250-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 LITCHFIELD IL
2017-08-21 217-296-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 SHELBYVL IL
2017-08-21 217-297-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 PANA IL
2017-08-21 217-573-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 RAYMOND IL
2017-08-21 217-608-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 HILLSBORO IL
2017-08-21 217-630-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NOKOMIS IL
2017-08-21 217-716-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 CARLINVL IL
2017-08-21 217-839-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 GILLESPIE IL

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.