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
— 580-203 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - OK 409F FORTTOWSON OK
— 580-204 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F BOSWELL OK
— 580-205 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F BENNINGTON OK
— 580-206 not yet reported which blocks → PANHANDLE TELECOMMUNICATIONS SYSTEMS, INC. 468B GUYMON OK
— 580-207 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ATOKA OK
— 580-208 0XXX1XXX4XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 IDABEL OK
— 580-209 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ANTLERS OK
— 580-210 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 ELK CITY OK
— 580-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
— 580-212 none assigned yet which blocks → UNITED STATES CELLULAR - OK 6272 IDABEL OK
— 580-213 not yet reported which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-214 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 CLINTON OK
— 580-215 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 LAWTON OK
— 580-216 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODWARD OK
— 580-217 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - OK 409F WILSON OK
— 580-218 0XXX1XXX2XXX5XXX7XXX8XXX · 6 holders which blocks → ONVOY, LLC - OK 409F BRECKENRDG OK
— 580-219 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TISHOMINGO OK
— 580-220 0XXX which blocks → SOUTHWESTERN BELL 9533 ARDMORE OK
— 580-221 not yet reported which blocks → SOUTHWESTERN BELL 9533 ARDMORE OK
— 580-223 not yet reported which blocks → SOUTHWESTERN BELL 9533 ARDMORE OK
— 580-224 1XXX7XXX which blocks → SOUTHWESTERN BELL 9533 ARDMORE OK
— 580-225 7XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 ELK CITY OK
— 580-226 not yet reported which blocks → SOUTHWESTERN BELL 9533 ARDMORE OK
— 580-227 8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 FAIRVIEW OK
— 580-228 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 WAURIKA OK
— 580-229 2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 HEALDTON OK
— 580-230 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 DURANT OK
— 580-231 3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ENID OK
— 580-233 not yet reported which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-234 not yet reported which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-237 not yet reported which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-239 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - OK 6272 ATOKA OK
— 580-240 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 TEMPLE OK
— 580-241 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 BATTIEST OK
— 580-242 9XXX which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-243 0XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 ELK CITY OK
— 580-244 not yet reported which blocks → WINDSTREAM OKLAHOMA, INC. 1965 SMITHVILLE OK
— 580-245 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 IDABEL OK
— 580-246 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 INDIAHOMA OK
— 580-248 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAWTON OK
— 580-249 not yet reported which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-250 not yet reported which blocks → SOUTHWESTERN BELL 9533 LAWTON OK
— 580-251 6XXX which blocks → SOUTHWESTERN BELL 9533 DUNCAN OK
— 580-252 7XXX which blocks → SOUTHWESTERN BELL 9533 DUNCAN OK
— 580-253 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 ADAMS OK
— 580-254 none assigned yet which blocks → SOUTHWESTERN BELL 9533 WOODWARD OK
— 580-255 not yet reported which blocks → SOUTHWESTERN BELL 9533 DUNCAN OK
— 580-256 not yet reported which blocks → SOUTHWESTERN BELL 9533 WOODWARD OK
— 580-258 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → UNITED STATES CELLULAR - OK 6272 COALGATE OK
— 580-259 not yet reported which blocks → PANHANDLE TELEPHONE COOPERATIVE, INC. 2016 FLORIS 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.