NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
2021-10-15 947-729 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
2021-10-13 562-578 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ALAMITOS CA
2021-10-13 564-232 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BREMERTON WA
2021-10-13 579-484 not yet reported which blocks → TELUS Mobility 8303 St-Hyacinthe —
2021-10-13 580-615 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - OK 409F DURANT OK
2021-10-13 585-579 0XXX1XXX8XXX9XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H BERGEN NY
2021-10-13 585-592 0XXX2XXX5XXX6XXX · 3 holders which blocks → PEERING HUB, INC. - NY 818H BELMONT NY
2021-10-13 605-510 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 RAPID CITY SD
2021-10-13 607-955 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 3 holders which blocks → FRACTEL, LLC 965H GROTON NY
2021-10-13 629-266 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TN 114F NASHVILLE TN
2021-10-13 657-531 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 HUNTITNBCH CA
2021-10-13 701-410 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDFORKS ND
2021-10-13 708-901 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2021-10-13 708-920 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2021-10-13 719-405 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F CRESTONE CO
2021-10-13 747-319 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BRBN SNVY CA
2021-10-13 769-266 0XXX1XXX2XXX3XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E MONTICELLO MS
2021-10-13 769-267 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E CARTHAGE MS
2021-10-13 769-268 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA MS - LLC 458C JACKSON MS
2021-10-13 825-973 not yet reported which blocks → TELUS Mobility 8301 Grande Prairie —
2021-10-13 825-974 not yet reported which blocks → TELUS Mobility 8301 High River —
2021-10-13 864-753 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SPARTANBG SC
2021-10-12 346-514 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 STAFFORD TX
2021-10-12 579-985 not yet reported which blocks → TELUS Mobility 8303 St-Jean —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.