NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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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Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 580-260 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F WAUKOMIS OK
— 580-261 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 KENTON OK
— 580-262 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLACKWELL OK
— 580-263 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → UNITED STATES CELLULAR - OK 6272 MADILL OK
— 580-265 1XXX3XXX5XXX6XXX8XXX · 2 holders which blocks → MID-AMERICA TEL., INC. 2010 STONEWALL OK
— 580-266 none assigned yet which blocks → SOUTHWEST OKLAHOMA TEL. CO. 2025 MARTHA OK
— 580-267 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 DEER CREEK OK
— 580-268 0XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 MARLAND OK
— 580-269 not yet reported which blocks → VALOR TELECOM TX.LP-OK DBA WINDSTREAM COMM SW 1165 KAW CITY OK
— 580-271 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - OK 6272 ANTLERS OK
— 580-272 none assigned yet which blocks → SOUTHWESTERN BELL 9533 ADA OK
— 580-273 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 WOODWARD OK
— 580-274 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 LONGDALE OK
— 580-275 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLINTON OK
— 580-276 none assigned yet which blocks → SOUTHWESTERN BELL 9533 MARIETTA OK
— 580-277 1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARDMORE OK
— 580-278 0XXX2XXX3XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ENID OK
— 580-279 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → METROPCS, INC. 5562 ADA OK
— 580-280 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 LAWTON OK
— 580-281 none assigned yet which blocks → SANTA ROSA TEL COOP INC 2141 RANDLETT OK
— 580-283 not yet reported which blocks → CHEROKEE TEL. CO. 1979 ACHILLE OK
— 580-284 none assigned yet which blocks → T-MOBILE USA, INC. 6529 LAWTON OK
— 580-285 not yet reported which blocks → CHEROKEE TEL. CO. 1979 YUBA OK
— 580-286 not yet reported which blocks → SOUTHWESTERN BELL 9533 IDABEL OK
— 580-287 none assigned yet which blocks → SOUTHWEST OKLAHOMA TEL. CO. 2025 WILLOW OK
— 580-288 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - OK 409F KREMLIN OK
— 580-289 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F RINGLING OK
— 580-293 not yet reported which blocks → KANOKLA TEL ASSN 1788 SOHARDTNER OK
— 580-294 not yet reported which blocks → CHICKASAW TEL. CO. 1980 GENE AUTRY OK
— 580-295 not yet reported which blocks → CHEROKEE TEL. CO. 1979 BOKCHITO OK
— 580-296 not yet reported which blocks → CHEROKEE TEL. CO. 1979 COLBERT OK
— 580-298 0XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ANTLERS OK
— 580-299 not yet reported which blocks → SANTA ROSA TEL COOP INC 2141 DEVOL OK
— 580-300 0XXX1XXX3XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - OK 7258 MARIETTA OK
— 580-301 2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 ALTUS OK
— 580-303 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ELK CITY OK
— 580-305 4XXX5XXX7XXX · 2 holders which blocks → UNITED STATES CELLULAR - OK 6272 FREDERICK OK
— 580-306 not yet reported which blocks → PINE TEL. CO. 2017 BROKEN BOW OK
— 580-310 8XXX which blocks → SOUTHWESTERN BELL 9533 ADA OK
— 580-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 580-314 not yet reported which blocks → PINE TELEPHONE COMPANY DBA PINE CELL PHONES, INC. 235C BROKEN BOW OK
— 580-316 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - OK 409F MADILL OK
— 580-317 0XXX6XXX which blocks → SOUTHWESTERN BELL 9533 HUGO OK
— 580-320 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 ADA OK
— 580-322 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAURIKA OK
— 580-323 not yet reported which blocks → SOUTHWESTERN BELL 9533 CLINTON OK
— 580-324 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 ENID OK
— 580-325 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - OK 409F HILLSDALE OK
— 580-326 not yet reported which blocks → SOUTHWESTERN BELL 9533 HUGO OK
— 580-327 9XXX which blocks → SOUTHWESTERN BELL 9533 ALVA OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.