AS number details

AS51859

Mainstream doo Beograd  ·  mainstream.eu

Serbia

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AS51859 – Mainstream doo Beograd

Field Value
Country Serbia
Website mainstream.eu
Hosted domains 863
Number of IPv4 9,984
Number of IPv6 673,439,381,371,246,869,545,123,577,856
ASN type Hosting
Registry ripe
Allocated 15 years ago on Nov 17, 2010
Updated a month ago on Oct 21, 2025

IP Ranges

Netblock Company Num of IPs
87.237.200.0/21 Mainstream doo Beograd 2,048
91.214.200.0/22 Mainstream doo Beograd 1,024
91.222.4.0/22 Virtual infrastructure 1,024
92.249.52.0/22 Mainstream doo Beograd 1,024
185.29.100.0/22 Virtual infrastructure 1,024
185.167.144.0/22 Mainstream Cloud 1,024
188.93.120.0/22 Mainstream doo Beograd 1,024
91.185.218.0/23 Enterprise Cloud 512
87.237.201.0/24 Virtual Infrastructure 256
87.237.202.0/24 Virtual Infrastructure 256
87.237.203.0/24 Virtual Infrastructure 256
87.237.204.0/24 Virtual Infrastructure 256
87.237.205.0/24 Mainstream Enterprise Cloud 256
87.237.206.0/24 Virtual infrastructure 256
87.237.207.0/24 Virtual infrastructure 256
91.185.199.0/24 Enterprise Cloud 256
91.185.223.0/24 Enterprise Cloud 256
91.222.4.0/24 Virtual infrastructure 256
91.222.5.0/24 Virtual infrastructure 256
91.222.6.0/24 Virtual infrastructure 256
91.222.7.0/24 Virtual infrastructure 256
92.249.53.0/24 Virtual infrastructure 256
185.29.100.0/24 Virtual infrastructure 256
185.29.101.0/24 Virtual infrastructure 256
185.29.102.0/24 Virtual infrastructure 256
185.29.103.0/24 Virtual infrastructure 256
185.167.146.0/24 Mainstream doo Beograd 256
185.167.147.0/24 Mainstream doo Beograd 256
185.168.19.0/24 Kancelarija za informacione tehnologije i elektronsku upravu 256
188.93.120.0/24 Virtual Infrastructure 256
188.93.121.0/24 Virtual Infrastructure 256
188.93.122.0/24 Virtual infrastructure 256
188.93.123.0/24 Virtual infrastructure 256
212.72.214.0/24 Vivacom Bulgaria EAD 256
213.91.181.0/24 Vivacom Bulgaria EAD 256

Netblock Company
2a04:2e40::/29 Mainstream doo Beograd
2a04:2e40::/34 Mainstream doo Beograd
2a04:2e40:4000::/34 Mainstream doo Beograd
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WHOIS Details

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                                                ASHandle:       AS51859
                                                OrgID:          AS51859
                                                ASName:         AS51859
                                                ASNumber:       AS51859
                                                RegDate:        0000-00-00
                                                Updated:        0000-00-00
                                                TechHandle:     AA00-AAAA
                                                Source:         AAAA
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Hosted Domains

There are 863 domain names hosted across 238 IP addresses on this ASN.

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IP Address Domain Domains on this IP
87.237.203.194 ██████████ 243
87.237.200.6 ██████████ 63
188.93.122.55 ██████████ 40
185.29.102.100 ██████████ 17
185.29.100.194 ██████████ 17
91.222.6.103 ██████████ 17
185.29.102.14 ██████████ 16
185.29.102.213 ██████████ 12
185.29.102.80 ██████████ 10
185.29.102.75 ██████████ 10

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Peers

There are 8 peers for this ASN.

Peers Name
AS13004 Serbian Open Exchange DOO
AS15958 CETINdoo-NET
AS211877 TurkIX Communications Ltd.
AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.
AS3212 Telemach Slovenija d.o.o.
AS8400 TELEKOM SRBIJA a.d.
AS8866 Vivacom Bulgaria EAD
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ASN API & Database

Upstreams

There are 5 upstreams for this ASN.

upstreams Name
AS15958 CETINdoo-NET
AS21215 UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd
AS3212 Telemach Slovenija d.o.o.
AS8400 TELEKOM SRBIJA a.d.
AS8866 Vivacom Bulgaria EAD
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ASN API & Database

Downstreams

There are no downstreams for this ASN.

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ASN API & Database

Pingable IPs

33 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
87.237.201.133 AS51859 Mainstream doo Beograd 0.43ms from Belgrade, RS
188.93.123.51 AS51859 Mainstream doo Beograd 0.56ms from Belgrade, RS
91.185.219.18 AS51859 Mainstream doo Beograd 0.70ms from Ljubljana, SI
91.185.218.46 AS51859 Mainstream doo Beograd 0.69ms from Ljubljana, SI
91.222.6.185 AS51859 Mainstream doo Beograd 0.65ms from Belgrade, RS
87.237.204.121 AS51859 Mainstream doo Beograd 0.56ms from Belgrade, RS
87.237.202.211 AS51859 Mainstream doo Beograd 0.43ms from Belgrade, RS
2a04:2e40:4202::1 AS51859 Mainstream doo Beograd 0.97ms from Belgrade, RS
87.237.203.169 AS51859 Mainstream doo Beograd 0.39ms from Belgrade, RS
87.237.206.238 AS51859 Mainstream doo Beograd 0.43ms from Belgrade, RS
2a04:2e40:4301::12 AS51859 Mainstream doo Beograd 0.95ms from Belgrade, RS
87.237.207.251 AS51859 Mainstream doo Beograd 0.52ms from Belgrade, RS
91.222.4.65 AS51859 Mainstream doo Beograd 0.41ms from Belgrade, RS
91.214.200.0 AS51859 Mainstream doo Beograd 3.96ms from Belgrade, RS
185.167.146.185 AS51859 Mainstream doo Beograd 0.66ms from Sofia, BG
185.29.100.203 AS51859 Mainstream doo Beograd 0.48ms from Belgrade, RS
185.29.103.195 AS51859 Mainstream doo Beograd 0.43ms from Belgrade, RS
188.93.120.1 AS51859 Mainstream doo Beograd 0.42ms from Belgrade, RS
91.222.7.129 AS51859 Mainstream doo Beograd 0.53ms from Belgrade, RS
91.185.199.64 AS51859 Mainstream doo Beograd 0.61ms from Ljubljana, SI
185.29.102.107 AS51859 Mainstream doo Beograd 0.44ms from Belgrade, RS
212.72.214.193 AS51859 Mainstream doo Beograd 0.67ms from Sofia, BG
185.168.19.27 AS51859 Mainstream doo Beograd 0.51ms from Belgrade, RS
185.29.101.80 AS51859 Mainstream doo Beograd 0.43ms from Belgrade, RS
213.91.181.9 AS51859 Mainstream doo Beograd 0.67ms from Sofia, BG

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
20.13.99.227 AS8075 Microsoft Corporation 0.21ms from Amsterdam, NL
147.123.196.3 AS15830 Equinix (EMEA) Acquisition Enterprises B.V. 0.39ms from Ashburn, US
47.13.237.67 AS20115 Charter Communications LLC 13.49ms from Atlanta, US
208.216.59.51 AS397858 Tharanco Group Inc 9.78ms from Boston, US
125.20.152.227 AS9498 BHARTI Airtel Ltd. 4.07ms from Delhi, IN
60.12.126.211 AS4837 CHINA UNICOM China169 Backbone 8.32ms from Hangzhou, CN
165.22.114.243 AS14061 DigitalOcean, LLC 0.28ms from London, GB
52.54.225.83 AS14618 Amazon.com, Inc. 0.19ms from Reston, US
54.210.115.195 AS14618 Amazon.com, Inc. 0.20ms from Reston, US
179.34.85.211 AS26615 TIM S/A 2.85ms from Sao Paulo, BR
114.145.220.195 AS4713 NTT DOCOMO BUSINESS,Inc. 2.48ms from Tokyo, JP
12.37.197.3 AS62861 Gray Media, Inc. 5.15ms from Atlanta, US
75.177.42.35 AS11426 Charter Communications Inc 4.08ms from Charlotte, US
51.91.195.147 AS16276 OVH SAS 2.78ms from Frankfurt am Main, DE
110.80.20.99 AS4134 CHINANET-BACKBONE 5.49ms from Fuzhou, CN
188.148.218.115 AS1257 Tele2 Sverige AB 7.17ms from Goeteborg, SE
221.201.95.67 AS4837 CHINA UNICOM China169 Backbone 10.91ms from Liaoyang, CN
88.35.90.51 AS3269 Telecom Italia S.p.A. 3.36ms from Milan, IT
80.69.244.131 AS44513 Optima Italia S.p.A. 2.58ms from Milan, IT
95.179.99.51 AS12389 PJSC Rostelecom 8.50ms from Moscow, RU
115.31.40.163 AS7522 STNet, Incorporated 3.87ms from Osaka, JP
201.1.101.51 AS27699 TELEFÔNICA BRASIL S.A 3.25ms from Osasco, BR
221.215.183.35 AS4837 CHINA UNICOM China169 Backbone 1.17ms from Qingdao, CN
192.251.183.3 AS395346 Bonneville County Idaho 7.97ms from Salt Lake City, US
39.112.157.211 AS9318 SK Broadband Co Ltd 6.75ms from Seoul, KR

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.

$
traceroute -a -n -q1 -f5 188.93.122.136
traceroute to 188.93.122.136 (188.93.122.136): 64 hops max, 52 byte packets
5 [AS21215] 185.81.60.51 181.649 ms
6 *
7 [AS51859] 91.222.4.187 180.67 ms
8 [AS51859] 188.93.122.136 180.479 ms
Measurement taken from IPinfo ProbeNet in Quito, EC
On

Related Networks

What is an ASN?

Autonomous System Numbers (ASNs) are assigned to entities such as Internet Service Providers and other large organizations that control blocks of IP addresses. This network page, and the organization field that's shown on the main IP address information page and also returned in the geolocation API are based on the ASN.

The ASN details will often correspond to the IP address owner, but for smaller organizations it may be that organization's parent, or their ISP. Find out more about AS51859 at robtex.

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