NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days — NPA 539
NEW CINGULAR WIRELESS PCS, LLC - IL 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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-09-13 539-955 5XXX8XXX9XXX · 2 holders which blocks → SKYE TELECOM LLC DBA SKYETEL 622J SOUTHELGIN OK
2021-08-04 539-386 0XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → FRACTEL, LLC 965H RIPLEY OK
2021-08-04 539-432 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H BRISTOW OK
2021-08-04 539-567 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SAPULPA OK
2021-08-04 539-667 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H OKMULGEE OK
2021-08-04 539-758 0XXX1XXX3XXX6XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H DEPEW OK
2021-08-04 539-789 0XXX6XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H FORTGIBSON OK
2021-08-04 539-842 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H JENKS OK
2021-06-30 539-250 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2021-06-30 539-251 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PRYOR OK
2021-06-23 539-249 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H SALLISAW OK
2021-06-17 539-248 0XXX2XXX8XXX · 2 holders which blocks → ONVOY, LLC - OK 409F BARNSDALL OK
2021-06-17 539-252 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F BROKENARRW OK
2021-06-17 539-253 2XXX3XXX9XXX · 2 holders which blocks → ONVOY, LLC - OK 409F QUAPAW OK
2021-06-17 539-254 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F SPIRO OK
2021-06-07 539-266 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 SALLISAW OK
2021-05-25 539-262 0–9 XXXall 10 · 7 holders which blocks → STRATUS NETWORKS 495J MUSKOGEE OK
2021-05-04 539-737 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WILBURTON OK
2021-05-04 539-895 0–9 XXXall 10 · 3 holders which blocks → TWILIO INTERNATIONAL, INC. 506J TULSA OK
2021-04-16 539-910 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2021-04-14 539-246 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 TAHLEQUAH OK
2021-04-14 539-901 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H TULSA OK
2021-03-31 539-257 0XXX1XXX3XXX5XXX8XXX9XXX · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - OK 119F CLEVELAND OK
2021-03-19 539-240 0–9 XXXall 10 · 2 holders which blocks → STRATUS NETWORKS 495J TULSA OK
2021-03-02 539-242 0–9 XXXall 10 · 5 holders which blocks → IP HORIZON LLC 515J TULSA OK
2021-03-02 539-593 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F TULSA OK
2021-02-26 539-241 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 CHOUTEAU OK
2021-02-09 539-476 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TULSA OK
2020-12-31 539-255 0XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → ONVOY, LLC - OK 409F PICHER OK
2020-12-02 539-243 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → ONVOY, LLC - OK 409F WATTS OK
2020-12-01 539-995 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - OK 409F MCALESTER OK
2020-09-09 539-247 7XXX which blocks → FRACTEL, LLC 965H SHIDLER OK
2020-09-09 539-346 2XXX which blocks → FRACTEL, LLC 965H DAVENPORT OK
2020-09-09 539-542 2XXX5XXX · 2 holders which blocks → FRACTEL, LLC 965H JENNINGS OK
2020-09-09 539-724 6XXX which blocks → FRACTEL, LLC 965H MANNFORD OK
2020-09-09 539-732 5XXX which blocks → FRACTEL, LLC 965H OCHELATA OK
2020-09-09 539-786 6XXX7XXX · 2 holders which blocks → FRACTEL, LLC 965H PRUE OK
2020-09-03 539-336 6XXX8XXX · 2 holders which blocks → FRACTEL, LLC 965H CEDARCREST OK
2020-09-03 539-356 7XXX9XXX which blocks → FRACTEL, LLC 965H HITCHITA OK
2020-09-03 539-465 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H AFTON OK
2020-09-03 539-946 3XXX which blocks → FRACTEL, LLC 965H FORAKER OK
2020-08-26 539-239 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 MUSKOGEE OK
2020-07-15 539-766 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H BROKENARRW OK
2020-07-14 539-529 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H BARTLESVL OK
2020-07-14 539-577 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H MIAMI OK
2020-07-01 539-348 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → FRACTEL, LLC 965H SO CHETOPA OK
2020-05-27 539-877 0XXX1XXX2XXX5XXX6XXX7XXX · 5 holders which blocks → TERRA NOVA TELECOM INC. 145J HARTSHORNE OK
2020-03-27 539-866 0XXX1XXX2XXX3XXX4XXX7XXX9XXX · 4 holders which blocks → TERRA NOVA TELECOM INC. 145J OILTON OK
2020-02-11 539-549 0–9 XXXall 10 · 6 holders which blocks → HD CARRIER LLC 321J TULSA OK
2019-12-23 539-238 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRISTOW OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.