NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026

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
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
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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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-10-15 206-759 0–9 XXXall 10 · 3 holders which blocks → AT&T - LOCAL 7421 BAINBDG IS WA
2021-10-15 262-382 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AT&T - LOCAL 7421 THIENSVL WI
2021-10-15 269-361 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BATTLE CRK MI
2021-10-15 269-378 2XXX7XXX8XXX9XXX · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HASTINGS MI
2021-10-15 331-279 0–9 XXXall 10 · 4 holders which blocks → PAETEC ITEL, LLC 829J ELMHURST IL
2021-10-15 341-206 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2021-10-15 364-210 0XXX1XXX8XXX9XXX · 4 holders which blocks → POWERTEL KENTUCKY LICENSES, INC. 365C PRINCETON KY
2021-10-15 365-730 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2021-10-15 365-731 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2021-10-15 365-732 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2021-10-15 480-810 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2021-10-15 517-302 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-15 520-699 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H SIERRAVIST AZ
2021-10-15 629-267 0–9 XXXall 10 · 4 holders which blocks → POWERTEL NASHVILLE LICENSES, INC. 7476 MURFREESBO TN
2021-10-15 715-991 0XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → T-MOBILE USA, INC. 6529 STEVENS PT WI
2021-10-15 725-262 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 LAS VEGAS NV
2021-10-15 762-330 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K MONTICELLO GA
2021-10-15 854-803 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H FOLLYBEACH SC
2021-10-15 854-839 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H SULLIVNSIS SC
2021-10-15 854-864 0XXX1XXX2XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H ISLE PALMS SC
2021-10-15 854-910 0XXX1XXX2XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H YEMASSEE SC
2021-10-15 872-871 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CHICGOZN01 IL
2021-10-15 873-251 not yet reported which blocks → 9164-3122 Quebec inc 843D Notre-Dame-du-Bon-Conseil —
2021-10-15 947-729 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ROYAL OAK MI
2021-10-15 984-584 0–9 XXXall 10 · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H APEX NC
2021-10-15 984-684 0–9 XXXall 10 · 6 holders which blocks → ONVOY SPECTRUM, LLC 624H CARY-RTP NC
2021-10-14 207-955 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LEWISTON ME
2021-10-14 229-281 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - GA 8392 VALDOSTA GA
2021-10-14 251-505 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H FRISCOCITY AL
2021-10-14 251-606 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H PINE APPLE AL
2021-10-14 272-313 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F HAMLIN PA
2021-10-14 343-462 not yet reported which blocks → TELUS Mobility 8303 Ottawa-Hull —
2021-10-14 385-502 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-10-14 435-321 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAMAS UT
2021-10-14 470-862 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 ATLANTA SO GA
2021-10-14 579-483 not yet reported which blocks → TELUS Mobility 8303 Bedford —
2021-10-14 660-308 0XXX1XXX3XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KIMBERLY MO
2021-10-14 707-914 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 FRFLD-SUIS CA
2021-10-14 984-384 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H ANGIER NC
2021-10-13 228-600 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H TANNERWLMS MS
2021-10-13 276-261 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - VA 6283 HILLSVILLE VA
2021-10-13 385-436 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 SALT LAKE UT
2021-10-13 404-595 0–9 XXXwhole prefix which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2021-10-13 431-726 not yet reported which blocks → TELUS Mobility 8303 Steinbach —
2021-10-13 434-506 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → METROPCS, INC. 5562 EMPORIA VA
2021-10-13 438-864 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2021-10-13 438-865 not yet reported which blocks → TELUS Mobility 8303 Montreal —
2021-10-13 504-397 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C KENNER LA
2021-10-13 505-498 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 LAS VEGAS NM
2021-10-13 507-850 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHFIELD MN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.