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
2021-12-14 931-677 0XXX1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 SANGO TN
2021-12-14 934-226 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 YAPHANK NY
2021-12-14 941-285 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BRADENTON FL
2021-12-13 223-426 0–9 XXXall 10 · 5 holders which blocks → CORE COMMUNICATIONS, INC. - PA 3806 WAYNESBORO PA
2021-12-13 343-856 not yet reported which blocks → Fibernetics Corporation 464D Arden —
2021-12-13 343-857 not yet reported which blocks → Fibernetics Corporation 464D Bloomfield —
2021-12-13 343-858 not yet reported which blocks → Fibernetics Corporation 464D Cardiff —
2021-12-13 343-859 not yet reported which blocks → Fibernetics Corporation 464D Coe Hill —
2021-12-13 343-860 not yet reported which blocks → Fibernetics Corporation 464D Denbigh —
2021-12-13 343-861 not yet reported which blocks → Fibernetics Corporation 464D Gilmour —
2021-12-13 343-862 not yet reported which blocks → Fibernetics Corporation 464D Maynooth —
2021-12-13 343-863 not yet reported which blocks → Fibernetics Corporation 464D Northbrook —
2021-12-13 343-864 not yet reported which blocks → Fibernetics Corporation 464D Thurlow —
2021-12-13 343-865 not yet reported which blocks → Fibernetics Corporation 464D Wellington —
2021-12-13 343-866 not yet reported which blocks → Fibernetics Corporation 464D Wooler —
2021-12-13 559-649 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 CLOVIS CA
2021-12-13 802-474 0–9 XXXall 10 · 6 holders which blocks → AIRUS, INC. - VT 665H BENNINGTON VT
2021-12-10 234-338 0XXX1XXX2XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J YOUNGSTOWN OH
2021-12-10 240-891 0XXX1XXX2XXX4XXX5XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 DAMASCS240 MD
2021-12-10 240-894 0XXX1XXX8XXX9XXX · 2 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J LXTNPKGRML MD
2021-12-10 249-629 not yet reported which blocks → Fibernetics Corporation 464D Little Britain —
2021-12-10 279-216 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SCRM MAIN CA
2021-12-10 279-944 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SCRM NORTH CA
2021-12-10 302-590 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DOVER DE
2021-12-10 307-458 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CASPER WY
2021-12-10 318-786 0XXX1XXX2XXX8XXX9XXX · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F BUNKIE LA
2021-12-10 318-802 0XXX3XXX9XXX · 2 holders which blocks → ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC 6916 TALLULAH LA
2021-12-10 326-204 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J DAYTON OH
2021-12-10 331-282 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC 224C HINSDALE IL
2021-12-10 332-238 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
2021-12-10 385-622 0–9 XXXall 10 · 7 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J SALT LAKE UT
2021-12-10 413-463 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPRINGFLD MA
2021-12-10 413-466 0–9 XXXall 10 · 5 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J HOLYOKE MA
2021-12-10 424-475 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 TORRANCE CA
2021-12-10 431-455 not yet reported which blocks → Fibernetics Corporation 464D Pilot Mound —
2021-12-10 431-456 not yet reported which blocks → Fibernetics Corporation 464D Sanford —
2021-12-10 431-457 not yet reported which blocks → Fibernetics Corporation 464D Southport —
2021-12-10 438-372 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2021-12-10 438-541 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2021-12-10 447-220 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J CHAMPAURBN IL
2021-12-10 448-202 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H FTWALTNBCH FL
2021-12-10 448-203 0–9 XXXall 10 · 5 holders which blocks → TELNYX LLC 073H MADISON FL
2021-12-10 505-519 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 GALLUP NM
2021-12-10 531-278 0–9 XXXall 10 · 2 holders which blocks → TELNYX LLC 073H LINCOLN NE
2021-12-10 580-680 0XXX6XXX · 2 holders which blocks → ONVOY, LLC - OK 409F ELMOREWEST OK
2021-12-10 607-413 9XXX which blocks → BOOST SUBSCRIBERCO L.L.C. 490J BINGHAMTON NY
2021-12-10 619-974 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2021-12-10 626-630 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PSDN PSDN CA
2021-12-10 657-537 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SILVERADO CA
2021-12-10 660-360 0XXX3XXX6XXX · 2 holders which blocks → ONVOY, LLC - MO 093F SO SEYMOUR MO

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.