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
2017-12-04 539-352-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOFFETT OK
2017-10-25 539-299-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C OKEMAH OK
2017-10-25 539-609-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-25 539-609-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-25 539-609-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-25 539-609-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-25 539-609-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BARTLESVL OK
2017-10-24 539-222-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-222-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-222-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-222-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-222-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-222-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-222-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-292-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-292-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-292-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-292-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-292-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-24 539-292-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TULSA OK
2017-10-10 539-217-2XXX 2000–2999Assigned ONVOY, LLC - OK 409F SAND SPG OK
2017-10-10 539-233-5XXX 5000–5999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-10-10 539-233-6XXX 6000–6999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-10-10 539-233-7XXX 7000–7999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-10-10 539-233-8XXX 8000–8999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-10-10 539-233-9XXX 9000–9999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-10-09 539-225-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 GORE OK
2017-10-09 539-227-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 KINTA OK
2017-10-09 539-331-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 QUINTON OK
2017-10-09 539-414-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 PORUM OK
2017-10-09 539-636-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 WEBBERSFLS OK
2017-09-29 539-214-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C FAIRFAX OK
2017-09-29 539-666-6XXX 6000–6999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-09-25 539-217-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SAND SPG OK
2017-09-21 539-208-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J OWASSO OK
2017-09-18 539-367-7XXX 7000–7999Assigned METROPCS, INC. 5562 BROKENARRW OK
2017-09-11 539-525-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J TULSA OK
2017-09-06 539-202-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - OK 119F TULSA OK
2017-08-29 539-321-9XXX 9000–9999Assigned VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 MORRIS OK
2017-08-22 539-233-0XXX 0000–0999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-08-22 539-233-1XXX 1000–1999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-08-22 539-233-2XXX 2000–2999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-08-22 539-233-3XXX 3000–3999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-08-22 539-233-4XXX 4000–4999Assigned ONVOY, LLC - OK 409F TULSA OK
2017-08-11 539-489-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - OK 5257 SNUGHARBOR OK
2017-08-03 539-867-5XXX 5000–5999Assigned COMMIO, LLC 939H TULSA OK
2017-07-28 539-286-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKMULGEE OK
2017-07-20 539-218-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 MUSKOGEE OK
2017-07-18 539-232-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C WILBURTON OK
2017-07-18 539-286-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J OKMULGEE 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.