NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2021-12-22 838-566 0XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → FRACTEL, LLC 965H TANNERSVL NY
2021-12-22 838-866 0XXX2XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H STREGISFLS NY
2021-12-22 854-229 0XXX1XXX2XXX3XXX4XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F WALTERBORO SC
2021-12-22 854-231 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F LAUREL BAY SC
2021-12-22 940-332 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J WICHITAFLS TX
2021-12-22 945-237 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MCKINNEY TX
2021-12-22 945-238 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TERRELL TX
2021-12-21 231-401 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → PENINSULA FIBER NETWORK, LLC - MI 116F TRAVERSECY MI
2021-12-21 234-342 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CANALFULTN OH
2021-12-21 320-544 0XXX1XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 HUTCHINSON MN
2021-12-21 326-435 0–9 XXXwhole prefix which blocks → TON80 COMMUNICATIONS, LLC 516J DAYTON OH
2021-12-21 351-344 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - MA 892D GLOUCESTER MA
2021-12-21 351-377 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLC - MA 892D PEABODY MA
2021-12-21 365-771 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Winona —
2021-12-21 380-241 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J COLUMBUS OH
2021-12-21 437-254 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-21 437-258 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-21 437-259 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-21 437-260 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2021-12-21 437-397 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-12-21 437-398 not yet reported which blocks → Bell Mobility 6574 Toronto —
2021-12-21 445-233 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA 6392 PHLDLPHZN2 PA
2021-12-21 463-626 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREENWOOD IN
2021-12-21 517-344 0–9 XXXall 10 · 6 holders which blocks → NUSO, LLC 478J JACKSON MI
2021-12-21 539-271 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J TULSA OK
2021-12-21 548-897 not yet reported which blocks → TELUS Integrated Communications 2782 Sarnia —
2021-12-21 559-774 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FRESNO CA
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

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.