NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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 ↓
Quick find in this area code:
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-04-10 734-280 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 WYANDOTTE MI
2018-04-10 825-223 not yet reported which blocks → TELUS 8084 St. Albert —
2018-04-10 929-474 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN03 NY
2018-04-09 226-569 not yet reported which blocks → Distributel 082E Ailsa Craig —
2018-04-09 226-570 not yet reported which blocks → Distributel 082E Belmont —
2018-04-09 226-571 not yet reported which blocks → Distributel 082E Centralia —
2018-04-09 226-572 not yet reported which blocks → Distributel 082E Crediton —
2018-04-09 226-573 not yet reported which blocks → Distributel 082E Dorchester —
2018-04-09 226-574 not yet reported which blocks → Distributel 082E Exeter —
2018-04-09 226-585 not yet reported which blocks → Distributel 082E Glencoe —
2018-04-09 226-586 not yet reported which blocks → Distributel 082E Harrietsville —
2018-04-09 226-587 not yet reported which blocks → Distributel 082E Ilderton —
2018-04-09 226-590 not yet reported which blocks → Distributel 082E Kerwood —
2018-04-09 226-591 not yet reported which blocks → Distributel 082E Lambeth —
2018-04-09 226-593 not yet reported which blocks → Distributel 082E Lucan —
2018-04-09 226-594 not yet reported which blocks → Distributel 082E Melbourne —
2018-04-09 226-595 not yet reported which blocks → Distributel 082E Mount Brydges —
2018-04-09 226-596 not yet reported which blocks → Distributel 082E Nairn —
2018-04-09 240-590 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 WSNGTNZN12 MD
2018-04-09 262-216 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HARTFORD WI
2018-04-09 321-291 0–9 XXXall 10 · 4 holders which blocks → METROPCS NETWORKS, LLC 899D TITUSVILLE FL
2018-04-09 343-279 not yet reported which blocks → Distributel 082E Seeleys Bay —
2018-04-09 343-280 not yet reported which blocks → Distributel 082E Selby —
2018-04-09 343-281 not yet reported which blocks → Distributel 082E Sydenham —
2018-04-09 343-282 not yet reported which blocks → Distributel 082E Tamworth —
2018-04-09 343-283 not yet reported which blocks → Distributel 082E Verona —
2018-04-09 343-284 not yet reported which blocks → Distributel 082E Wolfe Island —
2018-04-09 343-286 not yet reported which blocks → Distributel 082E Yarker —
2018-04-09 440-597 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 AMHERST OH
2018-04-09 442-382 0–9 XXXall 10 · 7 holders which blocks → METROPCS NETWORKS, LLC 899D VTVL HSPR CA
2018-04-09 478-677 0XXX6XXX7XXX9XXX · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K DUDLEY GA
2018-04-09 507-613 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 MANKATO MN
2018-04-09 515-949 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E EAGLEGROVE IA
2018-04-09 669-467 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 SUNNYVALE CA
2018-04-09 718-500 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 7133 NWYRCYZN06 NY
2018-04-09 814-550 4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 MEADVILLE PA
2018-04-09 857-344 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2018-04-09 937-637 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - OH 464C DAYTON OH
2018-04-09 939-344 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2018-04-09 949-774 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IRVINE CA
2018-04-06 224-289 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 DESPLAINES IL
2018-04-06 253-525 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GIG HARBOR WA
2018-04-06 343-205 not yet reported which blocks → Distributel 082E Adolphustown —
2018-04-06 343-206 not yet reported which blocks → Distributel 082E Bath —
2018-04-06 343-207 not yet reported which blocks → Distributel 082E Enterprise —
2018-04-06 343-208 not yet reported which blocks → Distributel 082E Gananoque —
2018-04-06 343-274 not yet reported which blocks → Distributel 082E Harrowsmith —
2018-04-06 343-275 not yet reported which blocks → Distributel 082E Inverary —
2018-04-06 343-276 not yet reported which blocks → Distributel 082E Napanee —
2018-04-06 343-277 not yet reported which blocks → Distributel 082E Newburgh —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.