NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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
2013-02-01 734-204 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2013-02-01 734-594 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 DEXTER MI
2013-02-01 747-221 0–9 XXXall 10 · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 GLENDALE CA
2013-02-01 747-233 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J VAN NUYS CA
2013-02-01 763-307 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN 5816 CAMBRIDGE MN
2013-02-01 818-452 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J NO HOLLYWD CA
2013-02-01 909-330 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E ETIWANDA CA
2013-02-01 909-352 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MARSHALL CA
2013-02-01 949-393 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SADLBK VLY CA
2013-01-31 229-433 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL 9417 VALDOSTA GA
2013-01-31 248-923 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J ROCHESTER MI
2013-01-31 469-503 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2013-01-31 506-948 not yet reported which blocks → Bell Mobility Aliant 329A Saint John —
2013-01-31 510-328 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2013-01-31 619-373 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J CHULAVISTA CA
2013-01-31 619-383 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J EL CAJON CA
2013-01-31 647-329 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 8377 Toronto —
2013-01-31 670-783 not yet reported which blocks → PTI PACIFICA INC. 387C SAIPAN —
2013-01-31 681-251 0XXX1XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F MAYBEURY WV
2013-01-31 681-329 0XXX1XXX2XXX3XXX4XXX5XXX · 4 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F COALWOOD WV
2013-01-31 709-948 not yet reported which blocks → Bell Mobility Aliant 329A St. John's —
2013-01-31 734-221 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J YPSILANTI MI
2013-01-31 760-573 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OCSD OCSD CA
2013-01-31 806-406 0XXX2XXX3XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 BEAN TX
2013-01-31 813-512 0–9 XXXall 10 · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 TAMPACEN FL
2013-01-31 901-509 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J MEMPHIS TN
2013-01-31 902-948 not yet reported which blocks → Bell Mobility Aliant 329A Charlottetown —
2013-01-30 306-998 not yet reported which blocks → Bell Mobility 6574 Saskatoon —
2013-01-30 401-999 0–9 XXXwhole prefix which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 CUMBLND HL RI
2013-01-30 431-944 not yet reported which blocks → Bell Mobility 6574 Winnipeg —
2013-01-30 438-948 not yet reported which blocks → Bell Mobility 6574 Montreal —
2013-01-30 475-675 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CT 199F SEYMOUR CT
2013-01-30 504-505 0–9 XXXwhole prefix which blocks → VOICESTREAM GSM I, LLC 150C NEWORLEANS LA
2013-01-30 647-944 not yet reported which blocks → Bell Mobility 6574 Toronto —
2013-01-30 778-944 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2013-01-30 862-404 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WHIPPANY NJ
2013-01-30 906-275 0–9 XXXall 10 · 7 holders which blocks → AT&T ENTERPRISES, LLC 516C HOUGHTON MI
2013-01-29 210-717 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2013-01-29 385-722 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2013-01-29 415-635 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SNFC CNTRL CA
2013-01-29 541-816 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OR 5820 MEDFORD OR
2013-01-29 661-473 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BKFD SOUTH CA
2013-01-29 706-873 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C SPARTA GA
2013-01-29 803-662 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ORANGEBURG SC
2013-01-28 289-560 not yet reported which blocks → Comwave Networks 160G West Lincoln —
2013-01-28 289-770 not yet reported which blocks → Comwave Networks 160G Grimsby —
2013-01-28 289-960 not yet reported which blocks → Comwave Networks 160G Caledonia —
2013-01-28 385-210 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 SALT LAKE UT
2013-01-28 440-475 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHAGRINFLS OH
2013-01-28 440-559 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CHAGRINFLS OH

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.