ASN AS51859 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS51859?

AS51859 is listed under Mainstream doo Beograd.

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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AS51859 Mainstream doo Beograd

Mainstream doo Beograd mainstream.rs

RS 38 Routes

AS Data

AS51859

AS51859 – Mainstream doo Beograd

AS Number	51859
AS Name	MNSHA-AS
Organization	Mainstream doo Beograd (org-cd2-ripe)
Country	RS
Website	mainstream.rs
Number of IPv4 Routes	35
Number of IPv6 Routes	3
ASN type	BUSINESS
Allocation Status	ASSIGNED
Registry	RIPE
Date Allocated	2010-11-17

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
188.93.120.0/22	AS51859	Mainstream doo Beograd	Virtual Infrastructure	1024
2a04:2e40::/34	AS51859	Mainstream doo Beograd	Mainstream doo Beograd	~20×10²⁷
188.93.122.0/24	AS51859	Mainstream doo Beograd	Virtual infrastructure	256
188.93.121.0/24	AS51859	Mainstream doo Beograd	Virtual Infrastructure	256
87.237.201.0/24	AS51859	Mainstream doo Beograd	Virtual Infrastructure	256
185.167.144.0/22	AS51859	Mainstream doo Beograd	Mainstream doo Beograd	1024
91.222.4.0/24	AS51859	Mainstream doo Beograd	Mainstream doo Beograd	256
87.237.207.0/24	AS51859	Mainstream doo Beograd	Virtual infrastructure	256
185.29.103.0/24	AS51859	Mainstream doo Beograd	Virtual infrastructure	256
213.91.181.0/24	AS51859	Mainstream doo Beograd	Mainstream doo Beograd	256

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 'AS51857 - AS52209'

as-block:       AS51857 - AS52209
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:        2024-12-12T14:34:06Z
last-modified:  2024-12-12T14:34:06Z
source:         RIPE

% Information related to 'AS51859'

% Abuse contact for 'AS51859' is 'abuse@mainstream.rs'

aut-num:        AS51859
as-name:        MNSHA-AS
org:            ORG-CD2-RIPE
remarks:        -------------- IPv4 Upstreams --------------
import:         from AS8400 accept ANY
export:         to AS8400 announce AS-MNSHA
import:         from AS31042 accept ANY
export:         to AS31042 announce AS-MNSHA
import:         from AS15958 accept ANY
export:         to AS15958 announce AS-MNSHA
import:         from AS8866 accept ANY
export:         to AS8866 announce AS-MNSHA
import:         from AS3212 accept ANY
export:         to AS3212 announce AS-MNSHA
import:         from AS21215 accept ANY
export:         to AS21215 announce AS-MNSHA
remarks:        --------------------------------------------
remarks:        --------------- IPv4 Peerings --------------
import:         from AS13004 accept AS-SOX
export:         to AS13004 announce AS-MNSHA
import:         from AS44143 accept AS-VIP-MOBLE
export:         to AS44143 announce AS-MNSHA
remarks:        --------------------------------------------
remarks:        -------------- IPv6 Upstreams --------------
mp-import:      afi ipv6.unicast from AS8400 accept ANY
mp-export:      afi ipv6.unicast to AS8400 announce AS-MNSHA
mp-import:      afi ipv6.unicast from AS15958 accept ANY
mp-export:      afi ipv6.unicast to AS15958 announce AS-MNSHA
remarks:        --------------------------------------------
remarks:        --------------- IPv6 Peerings --------------
mp-import:      afi ipv6.unicast from AS13004 accept AS-SOX
mp-export:      afi ipv6.unicast to AS13004 announce AS-MNSHA
remarks:        --------------------------------------------
admin-c:        PAVL8-RIPE
tech-c:         MRT59-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         MNSHA-MNT
created:        2010-11-17T13:26:14Z
last-modified:  2025-10-21T20:33:06Z
source:         RIPE

organisation:   ORG-CD2-RIPE
org-name:       Mainstream doo Beograd
country:        RS
org-type:       LIR
address:        Nusiceva 15
address:        11000
address:        Belgrade
address:        SERBIA
phone:          +381114409400
mnt-ref:        RIPE-NCC-HM-MNT
mnt-ref:        MNSHA-MNT
mnt-by:         RIPE-NCC-HM-MNT
mnt-by:         MNSHA-MNT
tech-c:         MRT59-RIPE
admin-c:        LJR11-RIPE
admin-c:        PAVL8-RIPE
abuse-c:        MAT282-RIPE
created:        2005-11-17T11:40:21Z
last-modified:  2023-04-12T11:25:39Z
source:         RIPE # Filtered

role:           Mainstream RIPE Team
address:        Mainstream doo
address:        Nusiceva 15
address:        11000 Beograd
address:        Serbia
phone:          +381114409420
admin-c:        PAVL8-RIPE
tech-c:         PAVL8-RIPE
mnt-by:         MNSHA-MNT
nic-hdl:        MRT59-RIPE
abuse-mailbox:  abuse@mainstream.eu
created:        2010-10-13T14:57:40Z
last-modified:  2024-06-04T12:57:19Z
source:         RIPE # Filtered

person:         Pavle Obradovic
address:        Mainstream d.o.o.
address:        Nusiceva 15
address:        11000 Belgrade
address:        Serbia
phone:          +381 11 440 9420
nic-hdl:        PAVL8-RIPE
mnt-by:         MNSHA-MNT
created:        2018-10-18T14:24:11Z
last-modified:  2025-10-21T20:33:49Z
source:         RIPE # Filtered

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

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.ripe.net",
  "as_blocks" : [ {
    "as_block" : "AS51857 - AS52209",
    "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" : "2024-12-12",
    "date_updated" : "2024-12-12",
    "source" : "RIPE"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS51859",
    "as_name" : "MNSHA-AS",
    "status" : "ASSIGNED",
    "import" : [ "from AS8400 accept ANY", "from AS31042 accept ANY", "from AS15958 accept ANY", "from AS8866 accept ANY", "from AS3212 accept ANY", "from AS21215 accept ANY", "from AS13004 accept AS-SOX", "from AS44143 accept AS-VIP-MOBLE" ],
    "mp_import" : [ "afi ipv6.unicast from AS8400 accept ANY", "afi ipv6.unicast from AS15958 accept ANY", "afi ipv6.unicast from AS13004 accept AS-SOX" ],
    "export" : [ "to AS8400 announce AS-MNSHA", "to AS31042 announce AS-MNSHA", "to AS15958 announce AS-MNSHA", "to AS8866 announce AS-MNSHA", "to AS3212 announce AS-MNSHA", "to AS21215 announce AS-MNSHA", "to AS13004 announce AS-MNSHA", "to AS44143 announce AS-MNSHA" ],
    "mp_export" : [ "afi ipv6.unicast to AS8400 announce AS-MNSHA", "afi ipv6.unicast to AS15958 announce AS-MNSHA", "afi ipv6.unicast to AS13004 announce AS-MNSHA" ],
    "organization" : "ORG-CD2-RIPE",
    "admin_contacts" : [ "PAVL8-RIPE" ],
    "tech_contacts" : [ "MRT59-RIPE" ],
    "remarks" : [ "-------------- IPv4 Upstreams --------------", "--------------------------------------------", "--------------- IPv4 Peerings --------------", "--------------------------------------------", "-------------- IPv6 Upstreams --------------", "--------------------------------------------", "--------------- IPv6 Peerings --------------", "--------------------------------------------" ],
    "mnt_by" : [ "RIPE-NCC-END-MNT", "MNSHA-MNT" ],
    "date_created" : "2010-11-17",
    "date_updated" : "2025-10-21",
    "source" : "RIPE"
  } ],
  "organization" : {
    "handle" : "ORG-CD2-RIPE",
    "name" : "Mainstream doo Beograd",
    "type" : "LIR",
    "address" : [ "Nusiceva 15", "11000", "Belgrade", "SERBIA" ],
    "street" : "Nusiceva",
    "city" : "Belgrade",
    "zip_code" : "11000",
    "country" : [ "RS" ],
    "phone" : [ "+381114409400" ],
    "admin_contacts" : [ "LJR11-RIPE", "PAVL8-RIPE" ],
    "tech_contacts" : [ "MRT59-RIPE" ],
    "abuse_contacts" : [ "MAT282-RIPE" ],
    "mnt_ref" : [ "RIPE-NCC-HM-MNT", "MNSHA-MNT" ],
    "mnt_by" : [ "RIPE-NCC-HM-MNT", "MNSHA-MNT" ],
    "date_created" : "2005-11-17",
    "date_updated" : "2023-04-12",
    "source" : "RIPE",
    "addressCountry" : "SERBIA"
  },
  "administrative_contacts" : [ {
    "handle" : "PAVL8-RIPE",
    "name" : "Pavle Obradovic",
    "address" : [ "Mainstream d.o.o.", "Nusiceva 15", "11000 Belgrade", "Serbia" ],
    "street" : "Nusiceva",
    "city" : "Belgrade",
    "zip_code" : "11000",
    "country" : "SERBIA",
    "phone" : [ "+381 11 440 9420" ],
    "mnt_by" : [ "MNSHA-MNT" ],
    "date_created" : "2018-10-18",
    "date_updated" : "2025-10-21",
    "source" : "RIPE",
    "addressCountry" : "SERBIA"
  } ],
  "technical_contacts" : [ {
    "handle" : "MRT59-RIPE",
    "name" : "Mainstream RIPE Team",
    "address" : [ "Mainstream doo", "Nusiceva 15", "11000 Beograd", "Serbia" ],
    "street" : "Nusiceva",
    "city" : "Beograd",
    "zip_code" : "11000",
    "country" : "SERBIA",
    "abuse_mailbox" : [ "abuse@mainstream.eu" ],
    "phone" : [ "+381114409420" ],
    "admin_contacts" : [ "PAVL8-RIPE" ],
    "tech_contacts" : [ "PAVL8-RIPE" ],
    "mnt_by" : [ "MNSHA-MNT" ],
    "date_created" : "2010-10-13",
    "date_updated" : "2024-06-04",
    "source" : "RIPE",
    "addressCountry" : "SERBIA"
  } ]
}

Peers

AS Number	Description	Country
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd	RS
AS8866	Vivacom Bulgaria EAD	BG
AS31042	Serbia BroadBand-Srpske Kablovske mreze d.o.o.	RS
AS15958	CETIN Ltd. Belgrade	RS
AS8400	TELEKOM SRBIJA a.d.	RS
AS3212	Telemach Slovenija d.o.o.	SI
AS31042	Serbia BroadBand Srpske Kablovske mreze d.o.o.	RS
AS13004	Serbian Open Exchange DOO	RS
AS44143	A1 Srbija d.o.o	RS

Upstreams

AS Number	Description	Country
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd	RS
AS8866	Vivacom Bulgaria EAD	BG
AS15958	CETIN Ltd. Belgrade	RS
AS8400	TELEKOM SRBIJA a.d.	RS
AS3212	Telemach Slovenija d.o.o.	SI
AS31042	Serbia BroadBand Srpske Kablovske mreze d.o.o.	RS
AS13004	Serbian Open Exchange DOO	RS

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