ASN AS57903 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS57903?

AS57903 is listed under Comfort XXI Century Ltd..

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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AS57903 Comfort XXI Century Ltd.

ASN Lookup Tool

Comfort XXI Century Ltd. komfort21vek.ru

RU 2 Routes

AS Data

AS57903

AS57903 – Comfort XXI Century Ltd.

AS Number	57903
AS Name	IPSERVICE
Organization	Comfort XXI Century Ltd. (org-cxcl1-ripe)
Country	RU
Website	komfort21vek.ru
Number of IPv4 Routes	2
Number of IPv6 Routes	0
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2012-03-08

ASN Intelligence API for production workflows

Use ASN data for AS57903 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
91.236.114.0/24	AS57903	MUSTAFAEV	Comfort XXI Century Ltd.	256
213.109.52.0/22	AS57903	Comfort XXI Century Ltd.	MediaCom Ltd.	1024

Raw Whois Response

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See https://docs.db.ripe.net/terms-conditions.html

% Note: this output has been filtered.
%       To receive output for a database update, use the "-B" flag.

% Information related to 'AS57370 - AS57973'

as-block:       AS57370 - AS57973
descr:          RIPE NCC ASN block
remarks:        These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by:         RIPE-NCC-HM-MNT
created:        2025-04-24T14:15:44Z
last-modified:  2025-04-24T14:15:44Z
source:         RIPE

% Information related to 'AS57903'

% Abuse contact for 'AS57903' is 'abuse@komfort21vek.ru'

aut-num:        AS57903
as-name:        IPSERVICE
org:            ORG-CXCL1-RIPE
import:         from AS6789 action pref=120; accept ANY
import:         from AS57903 accept AS57903
import:         from AS21011 action pref=120; accept ANY
export:         to AS6789 announce AS57903
export:         to AS21011 announce AS57903
export:         to AS57903 announce AS-CRIMEA-IX
admin-c:        SV6278-RIPE
tech-c:         SV6278-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         ru-comfort-1-mnt
created:        2012-03-08T12:55:34Z
last-modified:  2021-12-06T07:28:27Z
source:         RIPE

organisation:   ORG-CXCL1-RIPE
org-name:       Comfort XXI Century Ltd.
country:        RU
org-type:       LIR
address:        STREET ZOI ZHILTSOVA, D. 15, ROOM 40
address:        295017
address:        SIMFEROPOL, Republic of Crimea
address:        RUSSIAN FEDERATION
phone:          +7 918 260 60 18
phone:          +7 978 858 30 30
admin-c:        SV6278-RIPE
tech-c:         DM13652-RIPE
tech-c:         AL13183-RIPE
tech-c:         AP24440-RIPE
abuse-c:        AR32799-RIPE
mnt-ref:        ru-comfort-1-mnt
mnt-ref:        RIPE-NCC-HM-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         ru-comfort-1-mnt
created:        2015-07-06T14:10:54Z
last-modified:  2023-12-07T11:36:53Z
source:         RIPE # Filtered

person:         Shirokih Vera
address:        School 7, village Perovo
address:        297560
address:        Republic of Crimea
address:        RUSSIAN FEDERATION
phone:          +7 978 858 30 30
nic-hdl:        SV6278-RIPE
mnt-by:         ru-comfort-1-mnt
created:        2015-07-06T14:10:53Z
last-modified:  2015-07-06T14:10:54Z
source:         RIPE

% This query was served by the RIPE Database Query Service version 1.121.2 (SHETLAND)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS57370 - AS57973",
    "description" : [ "RIPE NCC ASN block" ],
    "remarks" : [ "These AS Numbers are assigned to network operators in the RIPE NCC service region." ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT" ],
    "date_created" : "2025-04-24",
    "date_updated" : "2025-04-24",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS57903",
    "as_name" : "IPSERVICE",
    "status" : "ASSIGNED",
    "import" : [ "from AS6789 action pref=120; accept ANY", "from AS57903 accept AS57903", "from AS21011 action pref=120; accept ANY" ],
    "export" : [ "to AS6789 announce AS57903", "to AS21011 announce AS57903", "to AS57903 announce AS-CRIMEA-IX" ],
    "organization" : "ORG-CXCL1-RIPE",
    "admin_contacts" : [ "SV6278-RIPE" ],
    "tech_contacts" : [ "SV6278-RIPE" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "ru-comfort-1-mnt" ],
    "date_created" : "2012-03-08",
    "date_updated" : "2021-12-06",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-CXCL1-RIPE",
    "name" : "Comfort XXI Century Ltd.",
    "type" : "LIR",
    "address" : [ "STREET ZOI ZHILTSOVA, D. 15, ROOM 40", "295017", "SIMFEROPOL, Republic of Crimea", "RUSSIAN FEDERATION" ],
    "street" : "Street Zoi Zhiltsova",
    "city" : "Simferopol",
    "state" : "REPUBLIC OF CRIMEA",
    "zip_code" : "295017",
    "country" : [ "RU" ],
    "phone" : [ "+7 918 260 60 18", "+7 978 858 30 30" ],
    "admin_contacts" : [ "SV6278-RIPE" ],
    "tech_contacts" : [ "DM13652-RIPE", "AL13183-RIPE", "AP24440-RIPE" ],
    "abuse_contacts" : [ "AR32799-RIPE" ],
    "mnt_ref" : [ "ru-comfort-1-mnt", "RIPE-NCC-HM-MNT" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "ru-comfort-1-mnt" ],
    "date_created" : "2015-07-06",
    "date_updated" : "2023-12-07",
    "source" : "RIPE",
    "addressCountry" : "RUSSIAN FEDERATION"
  },
  "administrative_contacts" : [ {
    "handle" : "SV6278-RIPE",
    "name" : "Shirokih Vera",
    "address" : [ "School 7, village Perovo", "297560", "Republic of Crimea", "RUSSIAN FEDERATION" ],
    "street" : "Village",
    "city" : "Perovo",
    "state" : "REPUBLIC OF CRIMEA",
    "zip_code" : "297560",
    "country" : "RUSSIAN FEDERATION",
    "phone" : [ "+7 978 858 30 30" ],
    "mnt_by" : [ "ru-comfort-1-mnt" ],
    "date_created" : "2015-07-06",
    "date_updated" : "2015-07-06",
    "source" : "RIPE",
    "addressCountry" : "RUSSIAN FEDERATION"
  } ],
  "technical_contacts" : [ {
    "handle" : "SV6278-RIPE",
    "name" : "Shirokih Vera",
    "address" : [ "School 7, village Perovo", "297560", "Republic of Crimea", "RUSSIAN FEDERATION" ],
    "street" : "Village",
    "city" : "Perovo",
    "state" : "REPUBLIC OF CRIMEA",
    "zip_code" : "297560",
    "country" : "RUSSIAN FEDERATION",
    "phone" : [ "+7 978 858 30 30" ],
    "mnt_by" : [ "ru-comfort-1-mnt" ],
    "date_created" : "2015-07-06",
    "date_updated" : "2015-07-06",
    "source" : "RIPE",
    "addressCountry" : "RUSSIAN FEDERATION"
  } ]
}

Peers

AS Number	Description	Country
AS21011	PRIVATE JOINT STOCK COMPANY DATAGROUP	UA
AS201776	Miranda Media Ltd	RU
AS6789	CRELCOM LLC	RU
AS201776	Miranda-Media Ltd	RU
AS57903	Comfort XXI Century Ltd.	RU

Upstreams

AS Number	Description	Country
AS201776	Miranda Media Ltd	RU
AS6789	CRELCOM LLC	RU