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
— 580-935 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 MARSHALL OK
— 580-937 5XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 WAPANUCKA OK
— 580-938 none assigned yet which blocks → PIONEER TEL. COOP., INC. 2018 SHATTUCK OK
— 580-939 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 HARMON OK
— 580-950 not yet reported which blocks → OK
— 580-953 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
— 580-958 not yet reported which blocks → OK
— 580-959 not yet reported which blocks → OK
— 580-963 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 HASTINGS OK
— 580-965 not yet reported which blocks → CHEROKEE TEL. CO. 1979 CARTWRIGHT OK
— 580-968 not yet reported which blocks → KANOKLA TEL ASSN 1788 SOBLF CITY OK
— 580-976 not yet reported which blocks → OK
— 580-977 0XXX which blocks → SOUTHWESTERN BELL 9533 ENID OK
— 580-981 not yet reported which blocks → PINE TEL. CO. 2017 WRIGHTCITY OK
— 580-983 5XXX which blocks → DOBSON TEL. CO. 1988 ROGERMILLS OK
— 580-985 not yet reported which blocks → KANOKLA TEL ASSN 1788 SO WALDRON OK
— 580-986 not yet reported which blocks → CHEROKEE TEL. CO. 1979 ATWOOD OK
— 580-987 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 CARMEN OK
— 580-988 not yet reported which blocks → OK
— 580-989 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 MUTUAL OK
— 580-991 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 TONKAWA OK
— 580-992 0XXX1XXX2XXX6XXX · 3 holders which blocks → ONVOY, LLC - OK 409F NEWKIRK OK
— 580-993 none assigned yet which blocks → CHICKASAW TEL. CO. 1980 DOUGHERTY OK
— 580-994 not yet reported which blocks → PIONEER TEL. COOP., INC. 2018 MOORELAND OK
— 580-995 not yet reported which blocks → DOBSON TEL. CO. 1988 VICI OK
— 580-996 0XXX2XXX6XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF OKLAHOMA, LLC - OK 384H MEDFORD OK
— 580-997 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C CHEROKEE OK
— 580-999 not yet reported which blocks → SOUTHWESTERN BELL 9533 XXXXXXXXXX OK
— 582-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-230 0XXX1XXX2XXX6XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7315 WATTSBURG PA
— 582-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST PA
— 582-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-700 not yet reported which blocks → PA
— 582-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX PA
— 582-950 not yet reported which blocks → PA
— 582-958 not yet reported which blocks → PA
— 582-959 not yet reported which blocks → PA
— 582-976 not yet reported which blocks → PA
— 585-202 none assigned yet which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 ROCHESTER NY
— 585-203 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 EROCHESTER NY
— 585-207 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K FILLMORE NY
— 585-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
— 585-214 9XXX which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 ROCHESTER NY
— 585-216 1XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 WEBSTER NY
— 585-217 0XXX1XXX2XXX3XXX6XXX7XXX · 2 holders which blocks → FRONTIER TELEPHONE OF ROCHESTER, INC. 0121 WEBSTER NY

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.