NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

357 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 27
ONVOY, LLC - NJ 20
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
2022-11-23 364-246 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLC - KY 896E NEBO KY
2022-11-23 458-291 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 GRANTSPASS OR
2022-11-23 480-931 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-11-23 507-975 0XXX7XXX9XXX · 2 holders which blocks → ONVOY, LLC - MN 184D STEWARTVL MN
2022-11-23 530-960 0XXX1XXX2XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C BIGGS CA
2022-11-23 605-905 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - SD 162G STURGIS SD
2022-11-23 606-860 0XXX1XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLC - KY 896E LIVINGSTON KY
2022-11-23 623-290 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 PHOENIX AZ
2022-11-23 661-651 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNCA NHCS CA
2022-11-23 667-420 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J FEDERALSBG MD
2022-11-23 719-690 0XXX1XXX2XXX7XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 LAMAR CO
2022-11-23 720-994 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2022-11-23 734-590 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C ANN ARBOR MI
2022-11-23 804-812 0–9 XXXall 10 · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J GLOUCESTER VA
2022-11-23 816-553 0–9 XXXall 10 · 6 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HARRISONVL MO
2022-11-23 857-420 0XXX4XXX5XXX6XXX7XXX8XXX which blocks → ONVOY, LLC - MA 892D CAMBRIDGE MA
2022-11-23 872-326 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC 224C CHICGOZN07 IL
2022-11-23 872-327 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC 224C CHICGOZN04 IL
2022-11-23 939-902 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2022-11-23 939-903 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2022-11-23 939-904 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2022-11-23 939-905 0–9 XXXwhole prefix which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J SANTURCE PR
2022-11-23 945-282 0–9 XXXwhole prefix which blocks → PAETEC ITEL, LLC 829J DALLAS TX
2022-11-23 970-559 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DURANGO CO
2022-11-22 318-913 0XXX1XXX2XXX4XXX9XXX · 3 holders which blocks → ONVOY, LLC - LA 749E MANGHAM LA
2022-11-22 346-605 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 HSTNSUBURB TX
2022-11-22 346-607 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 HOUSTON TX
2022-11-22 417-563 7XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - MO 4932 RICH HILL MO
2022-11-22 980-780 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - NC 638E CONCORD NC
2022-11-21 343-746 not yet reported which blocks → TELUS Integrated Communications 2782 North Augusta —
2022-11-21 438-842 not yet reported which blocks → TELUS Quebec 2243 Montreal —
2022-11-21 606-667 0XXX1XXX5XXX6XXX7XXX · 2 holders which blocks → ONVOY, LLC - KY 896E DOVER KY
2022-11-21 835-209 0–9 XXXall 10 · 3 holders which blocks → COMMIO, LLC 939H EASTON PA
2022-11-21 872-325 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHICGOZN02 IL
2022-11-21 912-643 0–9 XXXall 10 · 2 holders which blocks → COMSOUTH TELENET, INC. - GA 9161 SAVANNAH GA
2022-11-18 279-790 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - CA 649C FAIR OAKS CA
2022-11-18 337-617 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - LA 749E MERRYVILLE LA
2022-11-18 337-637 0XXX1XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLC - LA 749E RAYNE LA
2022-11-18 350-235 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C CLEMENTS CA
2022-11-18 479-491 0XXX1XXX2XXX4XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 CLARKSVL AR
2022-11-18 530-975 1XXX4XXX5XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C GRIDLEY CA
2022-11-18 747-447 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - CA 649C SNFN SNFN CA
2022-11-18 820-380 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - CA 649C PISMOBEACH CA
2022-11-18 840-240 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - CA 649C DIAMONDBAR CA
2022-11-18 939-353 0–9 XXXall 10 · 2 holders which blocks → LIBERTY MOBILE PUERTO RICO INC. 639J LARES PR
2022-11-18 943-223 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - GA 067D CARTERSVL GA
2022-11-18 951-617 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 ARLINGTON CA
2022-11-17 228-225 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J PASSCHRSTN MS
2022-11-17 260-477 7XXX9XXX · 2 holders which blocks → METROPCS, INC. 5562 MONROE IN
2022-11-17 272-307 0–9 XXXall 10 · 2 holders which blocks → RCN TELECOM SERVICES OF PENNSYLVANIA, INC. 7615 PITTSTON PA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.