ASN AS15355 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS15355?

AS15355 is listed under Eisler Capital US LLC.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

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AS15355 Eisler Capital US LLC

ASN Lookup Tool

Eisler Capital US LLC eislercapital.com

US 2 Routes

AS Data

AS15355

AS15355 – Eisler Capital US LLC

AS Number	15355
AS Name	EISLER-US
Organization	Eisler Capital US LLC (ecul-4)
Country	US
Website	eislercapital.com
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Registry	ARIN
Date Allocated	2025-01-29

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Use ASN data for AS15355 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
199.47.140.0/24	AS15355	Eisler Capital US LLC	Eisler Capital	256
199.47.140.0/23	AS15355	Eisler Capital US LLC	Eisler Capital	512

Raw Whois Response

#
# 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.
#


ASNumber:       15355
ASName:         EISLER-US
ASHandle:       AS15355
RegDate:        2025-01-29
Updated:        2025-01-29
Ref:            https://rdap.arin.net/registry/autnum/15355


OrgName:        Eisler Capital (US) LLC
OrgId:          ECUL-4
Address:        395 9th Avenue
Address:        56th Flr
City:           New York
StateProv:      NY
PostalCode:     10001
Country:        US
RegDate:        2024-09-06
Updated:        2024-09-30
Ref:            https://rdap.arin.net/registry/entity/ECUL-4


OrgDNSHandle: FISHB24-ARIN
OrgDNSName:   Fishbein, Greg 
OrgDNSPhone:  +1-332-455-0412 
OrgDNSEmail:  greg.fishbein@eislercapital.com
OrgDNSRef:    https://rdap.arin.net/registry/entity/FISHB24-ARIN

OrgAbuseHandle: FISHB24-ARIN
OrgAbuseName:   Fishbein, Greg 
OrgAbusePhone:  +1-332-455-0412 
OrgAbuseEmail:  greg.fishbein@eislercapital.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/FISHB24-ARIN

OrgRoutingHandle: FISHB24-ARIN
OrgRoutingName:   Fishbein, Greg 
OrgRoutingPhone:  +1-332-455-0412 
OrgRoutingEmail:  greg.fishbein@eislercapital.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/FISHB24-ARIN

OrgTechHandle: FISHB24-ARIN
OrgTechName:   Fishbein, Greg 
OrgTechPhone:  +1-332-455-0412 
OrgTechEmail:  greg.fishbein@eislercapital.com
OrgTechRef:    https://rdap.arin.net/registry/entity/FISHB24-ARIN

OrgNOCHandle: FISHB24-ARIN
OrgNOCName:   Fishbein, Greg 
OrgNOCPhone:  +1-332-455-0412 
OrgNOCEmail:  greg.fishbein@eislercapital.com
OrgNOCRef:    https://rdap.arin.net/registry/entity/FISHB24-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.
#

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.arin.net",
  "aut_nums" : [ {
    "aut_num" : "15355",
    "as_handle" : "AS15355",
    "as_name" : "EISLER-US",
    "admin_contacts" : [ "FISHB24-ARIN" ],
    "tech_contacts" : [ "FISHB24-ARIN", "FISHB24-ARIN" ],
    "abuse_contacts" : [ "FISHB24-ARIN" ],
    "date_created" : "2025-01-29",
    "date_updated" : "2025-01-29",
    "source" : "https://rdap.arin.net/registry/autnum/15355"
  } ],
  "organization" : {
    "handle" : "ECUL-4",
    "name" : "Eisler Capital (US) LLC",
    "address" : [ "395 9th Avenue", "56th Flr", "New York", "NY", "10001", "US" ],
    "street" : "9th Avenue 56th",
    "city" : "New York",
    "state" : "NY",
    "zip_code" : "10001",
    "country" : [ "US" ],
    "date_created" : "2024-09-06",
    "date_updated" : "2024-09-30",
    "source" : "https://rdap.arin.net/registry/entity/ECUL-4",
    "addressCountry" : "US"
  },
  "administrative_contacts" : [ {
    "handle" : "FISHB24-ARIN",
    "name" : "Fishbein, Greg",
    "email" : [ "greg.fishbein@eislercapital.com" ],
    "phone" : [ "+1-332-455-0412" ],
    "source" : "https://rdap.arin.net/registry/entity/FISHB24-ARIN"
  } ],
  "technical_contacts" : [ {
    "handle" : "FISHB24-ARIN",
    "name" : "Fishbein, Greg",
    "email" : [ "greg.fishbein@eislercapital.com" ],
    "phone" : [ "+1-332-455-0412" ],
    "source" : "https://rdap.arin.net/registry/entity/FISHB24-ARIN"
  } ],
  "abuse_contacts" : [ {
    "handle" : "FISHB24-ARIN",
    "name" : "Fishbein, Greg",
    "email" : [ "greg.fishbein@eislercapital.com" ],
    "phone" : [ "+1-332-455-0412" ],
    "source" : "https://rdap.arin.net/registry/entity/FISHB24-ARIN"
  } ]
}

Peers

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS15830	Equinix (EMEA) Acquisition Enterprises B.V.	NL
AS6461	Zayo Bandwidth	US
AS4200064299

Upstreams

AS Number	Description	Country
AS15830	Equinix EMEA Acquisition Enterprises B.V.	NL
AS6461	Zayo Bandwidth	US

Downstreams

AS Number	Description	Country
AS-94902997