NumberResearch Membership · Data 09/27/2026

Recent prefix assignments

341 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 21
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
2021-12-21 564-666 0XXX1XXX2XXX3XXX6XXX7XXX · 5 holders which blocks → FRACTEL, LLC 965H VADER WA
2021-12-21 586-301 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WARREN MI
2021-12-21 626-637 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H ARCADIA CA
2021-12-21 626-816 0–9 XXXall 10 · 6 holders which blocks → FRACTEL, LLC 965H EL MONTE CA
2021-12-21 626-879 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H MONROVIA CA
2021-12-21 626-886 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H LA PUENTE CA
2021-12-21 672-974 not yet reported which blocks → TELUS Mobility 8301 Victoria —
2021-12-21 709-957 not yet reported which blocks → Bell Mobility Aliant 329A St. John's —
2021-12-21 807-233 not yet reported which blocks → Keewaytinook Okimakanak 717G Sioux Lookout —
2021-12-21 854-226 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F HOLLYWOOD SC
2021-12-21 872-822 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 CHICGOZN07 IL
2021-12-21 872-844 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 CHICGOZN09 IL
2021-12-21 872-855 5XXX8XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 CHICGOZN04 IL
2021-12-21 929-766 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NWYRCYZN11 NY
2021-12-21 929-877 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H NWYRCYZN14 NY
2021-12-21 929-944 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H NWYRCYZN15 NY
2021-12-21 980-382 0–9 XXXall 10 · 2 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 CHARLOTTE NC
2021-12-21 986-219 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J IDAHOFALLS ID
2021-12-20 223-286 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BROGUE PA
2021-12-20 234-341 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 SALEM OH
2021-12-20 346-535 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HSTNSUBURB TX
2021-12-20 351-350 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 5 holders which blocks → METROPCS, INC. 5562 IPSWICH MA
2021-12-20 682-368 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 WEATHERFD TX
2021-12-20 775-491 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J RENO NV
2021-12-20 830-359 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 NEWBRANFLS TX
2021-12-20 913-415 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J KANSASCITY KS
2021-12-17 223-270 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LEBANON PA
2021-12-17 256-951 0–9 XXXall 10 · 4 holders which blocks → POWERTEL BIRMINGHAM LICENSES, INC. 7475 ARAB AL
2021-12-17 352-933 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 LEESBURG FL
2021-12-17 385-452 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PROVO UT
2021-12-17 385-453 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OGDEN UT
2021-12-17 435-317 0–9 XXXall 10 · 8 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LOGAN UT
2021-12-17 520-601 0XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 SELLS AZ
2021-12-17 520-607 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CASAGRANDE AZ
2021-12-17 534-277 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - WI 225C STEVENS PT WI
2021-12-17 575-270 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LAS CRUCES NM
2021-12-17 582-205 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F BELLEFONTE PA
2021-12-17 612-887 0–9 XXXwhole prefix which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2021-12-17 620-571 0XXX1XXX2XXX5XXX · 4 holders which blocks → IDEATEK TELCOM, LLC - KS 014E MEADE KS
2021-12-17 754-282 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E POMPANOBCH FL
2021-12-17 804-603 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F BETHIA VA
2021-12-17 804-630 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F CHESTER VA
2021-12-17 916-938 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 SO PLACER CA
2021-12-17 986-217 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BOISE ID
2021-12-16 365-766 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Burlington —
2021-12-16 365-966 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Burlington —
2021-12-16 463-261 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J INDIANAPLS IN
2021-12-16 470-907 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2021-12-16 470-908 0–9 XXXwhole prefix which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA NE GA
2021-12-16 509-970 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SPOKANE WA

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.