NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Which carriers received which NPA-NXX prefixes, and where. Assignments are initial assignments from NANPA records — because of number portability, the current serving carrier of individual numbers may differ. For finer-grained activity, see the thousands-block view above.

Most active assignees, last 30 days
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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-NXXAssigneeOCNRate centerState
917-953 AMERICAN MESSAGING SERVICES, LLC 9748 NWYRCYZN01 NY
917-954 SPOK, INC. 6630 NWYRCYZN01 NY
917-956 AMERICAN MESSAGING SERVICES, LLC 9748 NWYRCYZN01 NY
917-957 OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN01 NY
917-958 NY
917-959 NY
917-961 VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
917-964 SPOK, INC. 6630 NWYRCYZN06 NY
917-965 VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
917-968 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
917-969 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN01 NY
917-971 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
917-972 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN10 NY
917-974 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN06 NY
917-975 NEW CINGULAR WIRELESS PCS, LLC - DC 4036 NWYRCYZN06 NY
917-976 MULTIPLE OCN LISTING MULT XXXXXXXXXX NY
917-977 VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
917-978 SPOK, INC. 6630 NWYRCYZN01 NY
917-980 SPOK, INC. 6630 NWYRCYZN06 NY
917-981 VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
917-988 SPOK, INC. 6630 NWYRCYZN06 NY
917-989 SPOK, INC. 6630 NWYRCYZN06 NY
917-990 SPOK, INC. 6630 NWYRCYZN06 NY
917-991 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-992 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN01 NY
917-995 VERIZON NEW YORK, INC. 9104 NWYRCYZN01 NY
917-996 SPOK, INC. 6630 NWYRCYZN01 NY
917-999 ONVOY, LLC- NY 384C NWYRCYZN01 NY
918-200 TELEPORT COMMUNICATIONS AMERICA OK - LLC 530C TULSA OK
918-201 CSC VOICE, LLC 612K WAGONER OK
918-202 ONVOY, LLC - OK 409F CATOOSA OK
918-203 LEVEL 3 COMMUNICATIONS, LLC - OK 5257 FORTGIBSON OK
918-204 SOUTHWESTERN BELL 9533 TULSA OK
918-205 ONVOY, LLC - OK 409F COLLINSVL OK
918-207 SOUTHWESTERN BELL 9533 TAHLEQUAH OK
918-208 NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALLISAW OK
918-209 BANDWIDTH.COM CLEC, LLC - OK 119F JENKS OK
918-211 MULTIPLE OCN LISTING MULT XXXXXXXXXX OK
918-212 ONVOY, LLC - OK 409F OWASSO OK
918-213 T-MOBILE USA, INC. 6529 BARTLESVL OK
918-215 ONVOY, LLC - OK 409F SAND SPG OK
918-216 ONVOY, LLC - OK 409F SAPULPA OK
918-217 ONVOY, LLC - OK 409F SKIATOOK OK
918-218 ONVOY, LLC - OK 409F SPERRY OK
918-219 LEVEL 3 COMMUNICATIONS, LLC - OK 5257 AFTON OK
918-220 SPOK, INC. 6630 MCALESTER OK
918-221 NORTHEAST RURAL SERVICES, INC. - OK 945H TULSA OK
918-223 SOUTHWESTERN BELL 9533 CUSHING OK
918-224 SOUTHWESTERN BELL 9533 SAPULPA OK
918-225 SOUTHWESTERN BELL 9533 CUSHING OK

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.