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
2021-12-08 516-995 0–9 XXXall 10 · 5 holders which blocks → BARR TELL USA, INC. - NY 525G NASSAUZN03 NY
2021-12-08 540-934 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - VA 138E BLACKSBURG VA
2021-12-08 540-938 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 MINERAL VA
2021-12-08 561-785 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WPALMBEACH FL
2021-12-08 605-604 0XXX which blocks → MIDCO VOICE, LLC 858J BRANDON SD
2021-12-08 610-472 0XXX1XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - PA 7309 PHPHSBZN17 PA
2021-12-08 640-226 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F LAWRENCEVL NJ
2021-12-08 641-341 4XXX which blocks → ONVOY, LLC - IA 221F THORNTON IA
2021-12-08 660-387 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WESTVILLE MO
2021-12-08 661-625 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 SNCA NHCS CA
2021-12-08 712-414 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 8 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E RED OAK IA
2021-12-08 747-306 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GLENDALE CA
2021-12-08 757-731 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J NRFOLKZON2 VA
2021-12-08 813-937 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPAWST FL
2021-12-08 813-939 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 TAMPACEN FL
2021-12-08 816-409 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLUE SPG MO
2021-12-08 830-380 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C BULVERDE TX
2021-12-08 857-394 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELMONT MA
2021-12-08 862-392 0XXX which blocks → BANDWIDTH.COM CLEC, LLC - NJ 118F ERSKINELKS NJ
2021-12-08 939-324 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NARANJITO PR
2021-12-08 939-371 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 CAROLINA PR
2021-12-08 949-708 0–9 XXXall 10 · 2 holders which blocks → LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 IRVINE CA
2021-12-08 985-349 0XXX1XXX2XXX3XXX6XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - LA 153F FOLSOM LA
2021-12-08 989-470 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GAYLORD MI
2021-12-07 240-854 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSHNGTNZN4 MD
2021-12-07 240-887 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHTON236 MD
2021-12-07 240-890 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 WSHNGTNZN5 MD
2021-12-07 318-895 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SHREVEPORT LA
2021-12-07 337-895 0–9 XXXall 10 · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J LAFAYETTE LA
2021-12-07 447-219 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 CHARLESTON IL
2021-12-07 571-587 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN19 VA
2021-12-07 571-622 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN08 VA
2021-12-07 574-895 0–9 XXXall 10 · 2 holders which blocks → TWILIO INTERNATIONAL, INC. 506J SOUTH BEND IN
2021-12-07 585-603 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J ROCHESTER NY
2021-12-07 662-877 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - MS 992E INDIANOLA MS
2021-12-07 667-375 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 CHASE MD
2021-12-07 667-378 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ESSEX MD
2021-12-07 667-379 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2021-12-07 667-381 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 PARKVILLE MD
2021-12-07 667-383 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TOWSON MD
2021-12-07 804-637 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 ASHLAND VA
2021-12-07 804-682 0–9 XXXall 10 · 7 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 TAPPAHNNCK VA
2021-12-06 203-670 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - CT 6624 FAIRFIELD CT
2021-12-06 218-609 0XXX1XXX2XXX3XXX8XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - MN 980E CLOQUET MN
2021-12-06 228-278 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 OCEAN SPG MS
2021-12-06 240-889 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 WSNGTNZN10 MD
2021-12-06 343-227 not yet reported which blocks → TELUS Integrated Communications 2782 Ottawa-Hull —
2021-12-06 445-226 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN4 PA
2021-12-06 551-339 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 BAYONNE NJ
2021-12-06 551-341 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NJ 6623 FAIR LAWN NJ

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.