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
2018-10-30 539-345-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 GROVE OK
2018-10-30 539-345-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 GROVE OK
2018-10-30 539-525-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-30 539-525-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2018-10-29 539-629-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F TULSA OK
2018-10-19 539-299-0XXX 0000–0999Assigned TELNYX LLC 073H OKEMAH OK
2018-10-19 539-305-4XXX 4000–4999Assigned TELNYX LLC 073H KETCHUM OK
2018-10-18 539-209-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F WAGONER OK
2018-10-18 539-209-4XXX 4000–4999Assigned ONVOY, LLC - OK 409F WAGONER OK
2018-09-25 539-232-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F WILBURTON OK
2018-09-21 539-218-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MUSKOGEE OK
2018-09-21 539-224-5XXX 5000–5999Assigned ONVOY, LLC - OK 409F WMAYSVILLE OK
2018-09-18 539-245-4XXX 4000–4999Assigned ONVOY, LLC - OK 409F POCOLA OK
2018-09-18 539-328-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F COLCORD OK
2018-09-18 539-352-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F MOFFETT OK
2018-09-13 539-232-1XXX 1000–1999Assigned TELNYX LLC 073H WILBURTON OK
2018-09-13 539-666-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F TULSA OK
2018-09-13 539-666-4XXX 4000–4999Assigned ONVOY, LLC - OK 409F TULSA OK
2018-09-13 539-666-5XXX 5000–5999Assigned ONVOY, LLC - OK 409F TULSA OK
2018-09-04 539-325-1XXX 1000–1999Assigned CROSS CABLE TELEVISION, LLC - OK 809H TULSA OK
2018-08-24 539-218-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MUSKOGEE OK
2018-08-24 539-218-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MUSKOGEE OK
2018-08-22 539-333-2XXX 2000–2999Assigned PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H AFTON OK
2018-06-29 539-204-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F BRISTOW OK
2018-06-26 539-200-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F BARNSDALL OK
2018-06-05 539-214-9XXX 9000–9999Assigned VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 FAIRFAX OK
2018-05-31 539-352-9XXX 9000–9999Assigned METROPCS, INC. 5562 MOFFETT OK
2018-05-08 539-204-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F BRISTOW OK
2018-05-08 539-244-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F OKMULGEE OK
2018-05-07 539-215-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2018-05-07 539-215-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2018-03-14 539-204-9XXX 9000–9999Assigned ONVOY, LLC - OK 409F BRISTOW OK
2018-03-14 539-210-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F PRYOR OK
2018-03-14 539-232-0XXX 0000–0999Assigned ONVOY, LLC - OK 409F WILBURTON OK
2018-03-14 539-589-1XXX 1000–1999Assigned ONVOY, LLC - OK 409F SKIATOOK OK
2018-03-13 539-208-1XXX 1000–1999Assigned ONVOY, LLC - OK 409F OWASSO OK
2018-03-12 539-589-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F SKIATOOK OK
2018-02-21 539-217-0XXX 0000–0999Assigned ONVOY, LLC - OK 409F SAND SPG OK
2017-12-15 539-430-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D TULSA OK
2017-12-13 539-221-9XXX 9000–9999Assigned VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 HASKELL OK
2017-12-12 539-244-4XXX 4000–4999Assigned ONVOY, LLC - OK 409F OKMULGEE OK
2017-12-08 539-229-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 ARPELAR OK
2017-12-08 539-899-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 STUART OK
2017-12-04 539-245-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J POCOLA 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.