NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

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

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
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 —
2018-04-06 343-278 not yet reported which blocks → Distributel 082E Odessa —
2018-04-06 343-287 not yet reported which blocks → Distributel 082E Deseronto —
2018-04-06 434-595 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - VA 138E PAMPLIN VA
2018-04-06 470-782 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E COVINGTON GA
2018-04-06 980-771 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - NC 998E CHARLOTTE NC
2018-04-05 236-488 not yet reported which blocks → TELUS 8086 Oliver —
2018-04-05 253-993 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2018-04-05 469-465 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2018-04-05 510-955 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 OKLD TRNID CA
2018-04-05 530-922 0–9 XXXall 10 · 5 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OROVILLE CA
2018-04-05 651-358 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MN 184D TWINCITIES MN
2018-04-05 681-662 0XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - WV 077G HARPESFRRY WV
2018-04-05 785-898 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - KS 986E HANOVRHNBG KS
2018-04-04 249-799 not yet reported which blocks → InnSysVoice Corp 383H Bailieboro —
2018-04-04 343-677 not yet reported which blocks → InnSysVoice Corp 383H Wellington —
2018-04-04 343-699 not yet reported which blocks → InnSysVoice Corp 383H Trenton —
2018-04-04 343-744 not yet reported which blocks → InnSysVoice Corp 383H Bloomfield —
2018-04-04 343-755 not yet reported which blocks → InnSysVoice Corp 383H Bancroft —
2018-04-04 343-788 not yet reported which blocks → InnSysVoice Corp 383H Belleville —
2018-04-04 343-933 not yet reported which blocks → InnSysVoice Corp 383H Brighton —
2018-04-04 407-663 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E WINTERPARK FL
2018-04-04 417-908 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 SPRINGFLD MO

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.