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 539
NEW CINGULAR WIRELESS PCS, LLC - IL 4
ONVOY, LLC - OK 3
TELEPORT COMMUNICATIONS AMERICA OK - LLC 1
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
2019-04-10 539-430-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-430-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-430-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-430-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-430-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-430-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-430-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2019-04-10 539-609-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2019-04-10 539-609-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2019-04-10 539-609-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2019-04-09 539-609-0XXX 0000–0999Assigned ONVOY, LLC - OK 409F BARTLESVL OK
2019-04-09 539-609-1XXX 1000–1999Assigned ONVOY, LLC - OK 409F BARTLESVL OK
2019-04-04 539-216-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CHECOTAH OK
2019-04-04 539-231-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 DEWEY OK
2019-04-04 539-231-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 DEWEY OK
2019-04-04 539-269-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EUFAULA OK
2019-04-02 539-228-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J GROVE OK
2019-04-02 539-323-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-04-02 539-323-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VINITA OK
2019-03-27 539-430-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C TULSA OK
2019-02-27 539-208-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F OWASSO OK
2019-02-27 539-220-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 HEAVENER OK
2019-02-21 539-900-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J TULSA OK
2019-02-13 539-215-9XXX 9000–9999Assigned PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H TULSA OK
2019-02-12 539-217-3XXX 3000–3999Assigned PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H SAND SPG OK
2019-01-18 539-210-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 PRYOR OK
2019-01-18 539-210-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PRYOR OK
2019-01-18 539-210-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PRYOR OK
2018-12-28 539-207-9XXX 9000–9999Assigned TELNYX LLC 073H CHELSEA OK
2018-12-21 539-232-8XXX 8000–8999Assigned ONVOY, LLC - OK 409F WILBURTON OK
2018-12-21 539-232-9XXX 9000–9999Assigned ONVOY, LLC - OK 409F WILBURTON OK
2018-12-11 539-321-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F MORRIS OK
2018-12-07 539-367-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BROKENARRW OK
2018-12-07 539-367-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BROKENARRW OK
2018-12-07 539-367-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROKENARRW OK
2018-12-07 539-367-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BROKENARRW OK
2018-12-07 539-867-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2018-12-07 539-867-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2018-12-07 539-867-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2018-12-07 539-867-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2018-11-07 539-217-8XXX 8000–8999Assigned ONVOY, LLC - OK 409F SAND SPG OK
2018-11-07 539-217-9XXX 9000–9999Assigned ONVOY, LLC - OK 409F SAND SPG OK
2018-10-30 539-345-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 GROVE OK

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.