# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # # # Query terms are ambiguous. The query is assumed to be: # "n 204.128.52.16" # # Use "?" to get help. # NetRange: 204.128.52.0 - 204.128.55.255 CIDR: 204.128.52.0/22 NetName: MARKETAXESS-INC-NETBLK-1 NetHandle: NET-204-128-52-0-1 Parent: NET204 (NET-204-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: MARKETAXESS HOLDINGS, INC. (MARKE-84) RegDate: 2009-01-22 Updated: 2022-09-06 Ref: https://rdap.arin.net/registry/ip/204.128.52.0 OrgName: MARKETAXESS HOLDINGS, INC. OrgId: MARKE-84 Address: 299 Park Avenue, 10th Floor City: NEW YORK StateProv: NY PostalCode: 10171 Country: US RegDate: 2008-04-15 Updated: 2022-09-06 Ref: https://rdap.arin.net/registry/entity/MARKE-84 OrgAbuseHandle: NEMH-ARIN OrgAbuseName: Network Engineering - MarketAxess Holdings inc OrgAbusePhone: +1-212-813-6222 OrgAbuseEmail: NETWORK@marketaxess.com OrgAbuseRef: https://rdap.arin.net/registry/entity/NEMH-ARIN OrgNOCHandle: NEMH-ARIN OrgNOCName: Network Engineering - MarketAxess Holdings inc OrgNOCPhone: +1-212-813-6222 OrgNOCEmail: NETWORK@marketaxess.com OrgNOCRef: https://rdap.arin.net/registry/entity/NEMH-ARIN OrgTechHandle: NEMH-ARIN OrgTechName: Network Engineering - MarketAxess Holdings inc OrgTechPhone: +1-212-813-6222 OrgTechEmail: NETWORK@marketaxess.com OrgTechRef: https://rdap.arin.net/registry/entity/NEMH-ARIN RNOCHandle: NEMH-ARIN RNOCName: Network Engineering - MarketAxess Holdings inc RNOCPhone: +1-212-813-6222 RNOCEmail: NETWORK@marketaxess.com RNOCRef: https://rdap.arin.net/registry/entity/NEMH-ARIN RAbuseHandle: NEMH-ARIN RAbuseName: Network Engineering - MarketAxess Holdings inc RAbusePhone: +1-212-813-6222 RAbuseEmail: NETWORK@marketaxess.com RAbuseRef: https://rdap.arin.net/registry/entity/NEMH-ARIN RTechHandle: NEMH-ARIN RTechName: Network Engineering - MarketAxess Holdings inc RTechPhone: +1-212-813-6222 RTechEmail: NETWORK@marketaxess.com RTechRef: https://rdap.arin.net/registry/entity/NEMH-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. #