Autonomous System details

AS51859

Mainstream doo Beograd · mainstream.eu

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AS51859 – Mainstream doo Beograd

Field	Value
Country	Serbia
Website	mainstream.eu
Hosted domains	927
IPv4 addresses	9,984
IPv6 addresses	673,439,381,371,246,869,545,123,577,856
ASN type	Hosting
Registry	ripe
Allocated	15 years ago on Nov 17, 2010
Updated	2 months ago on Oct 21, 2025

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 927 domain names hosted across 244 IP addresses on this ASN.

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IP Address	Domain	Domains on this IP
87.237.203.194	██████████	309
87.237.200.6	██████████	61
188.93.122.55	██████████	39
185.29.102.100	██████████	18
91.222.6.103	██████████	17
185.29.100.194	██████████	17
185.29.102.14	██████████	15
185.29.102.213	██████	12
185.29.102.75	██████████	10
185.29.102.80	██████████	10

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Peers

There are 7 peers for this ASN.

Peers	Name
AS13004	Serbian Open Exchange DOO
AS15958	CETINdoo-NET
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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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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Downstreams

There are no downstreams for this ASN.

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Pingable IPs

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

IP Address	ASN	Details
87.237.205.65	AS51859 Mainstream doo Beograd	`0.99ms` from Belgrade, RS
185.168.19.132	AS51859 Mainstream doo Beograd	`0.53ms` from Belgrade, RS
91.185.218.19	AS51859 Mainstream doo Beograd	`0.68ms` from Ljubljana, SI
185.29.101.79	AS51859 Mainstream doo Beograd	`0.41ms` from Belgrade, RS
87.237.202.211	AS51859 Mainstream doo Beograd	`0.53ms` from Belgrade, RS
2a04:2e40:4202::1	AS51859 Mainstream doo Beograd	`1.01ms` from Belgrade, RS
87.237.203.49	AS51859 Mainstream doo Beograd	`0.38ms` from Belgrade, RS
185.167.146.77	AS51859 Mainstream doo Beograd	`0.66ms` from Sofia, BG
188.93.121.10	AS51859 Mainstream doo Beograd	`0.55ms` from Belgrade, RS
212.72.214.75	AS51859 Mainstream doo Beograd	`0.67ms` from Sofia, BG
91.214.200.0	AS51859 Mainstream doo Beograd	`2.24ms` from Belgrade, RS
91.222.5.248	AS51859 Mainstream doo Beograd	`0.59ms` from Belgrade, RS
185.29.100.203	AS51859 Mainstream doo Beograd	`0.47ms` from Belgrade, RS
92.249.55.107	AS51859 Mainstream doo Beograd	`0.35ms` from Belgrade, RS
87.237.207.251	AS51859 Mainstream doo Beograd	`0.55ms` from Belgrade, RS
185.29.102.51	AS51859 Mainstream doo Beograd	`0.41ms` from Belgrade, RS
91.185.199.69	AS51859 Mainstream doo Beograd	`0.61ms` from Ljubljana, SI
2a04:2e40:300::eeee:2	AS51859 Mainstream doo Beograd	`0.76ms` from Belgrade, RS
188.93.120.1	AS51859 Mainstream doo Beograd	`0.44ms` from Belgrade, RS
91.222.7.253	AS51859 Mainstream doo Beograd	`0.54ms` from Belgrade, RS
87.237.206.4	AS51859 Mainstream doo Beograd	`0.40ms` from Belgrade, RS
87.237.201.131	AS51859 Mainstream doo Beograd	`0.52ms` from Belgrade, RS
188.93.122.26	AS51859 Mainstream doo Beograd	`0.63ms` from Belgrade, RS
87.237.204.122	AS51859 Mainstream doo Beograd	`0.58ms` from Belgrade, RS
185.29.103.195	AS51859 Mainstream doo Beograd	`0.43ms` from Belgrade, RS

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
123.30.149.67	AS45899 VNPT Corp	`0.69ms` from Hanoi, VN
151.228.156.99	AS5607 Sky UK Limited	`4.28ms` from London, GB
2.125.138.99	AS5607 Sky UK Limited	`6.46ms` from London, GB
62.37.232.243	AS12479 Orange Espagne SA	`0.54ms` from Madrid, ES
172.233.120.99	AS63949 Akamai Connected Cloud	`0.65ms` from Madrid, ES
124.190.59.131	AS1221 Telstra Limited	`3.88ms` from Melbourne, AU
162.196.30.131	AS7018 AT&T Enterprises, LLC	`6.83ms` from Miami, US
69.158.153.99	AS577 Bell Canada	`1.68ms` from Montreal, CA
3.7.122.227	AS16509 Amazon.com, Inc.	`0.13ms` from Mumbai, IN
95.115.155.19	AS6805 Telefonica Germany GmbH & Co.OHG	`14.25ms` from Nuernberg, DE
58.140.188.163	AS10036 DLIVE	`4.28ms` from Seoul, KR
211.38.191.19	AS4766 Korea Telecom	`4.49ms` from Seoul, KR
222.98.146.3	AS4766 Korea Telecom	`1.97ms` from Seoul, KR
1.249.63.51	AS9318 SK Broadband Co Ltd	`6.06ms` from Seoul, KR
39.113.175.67	AS9318 SK Broadband Co Ltd	`2.13ms` from Seoul, KR
64.33.224.3	AS15204 INTERSTATE TELECOMMUNICATIONS COOPERATIVE, INC.	`3.28ms` from Sioux Falls, US
51.105.166.67	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
223.83.51.147	AS56045 China Mobile communications corporation	`12.75ms` from Changsha, CN
95.65.103.131	AS31252 StarNet Solutii SRL	`0.51ms` from Chisinau, MD
50.235.78.131	AS7922 Comcast Cable Communications, LLC	`1.06ms` from Miami, US
13.234.49.83	AS16509 Amazon.com, Inc.	`0.15ms` from Mumbai, IN
153.215.146.195	AS4713 NTT DOCOMO BUSINESS,Inc.	`10.10ms` from Osaka, JP
184.103.15.67	AS209 CenturyLink Communications, LLC	`4.11ms` from Phoenix, US
112.254.107.131	AS4837 CHINA UNICOM China169 Backbone	`2.26ms` from Qingdao, CN
64.64.22.99	AS7203 Leaseweb USA, Inc.	`0.10ms` from San Jose, US

Traceroute

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

traceroute -a -n -q1 -f3 213.91.181.10

traceroute to 213.91.181.10 (213.91.181.10): 64 hops max, 52 byte packets

3 [AS1299] 213.248.72.57 0.593 ms

4 *

5 *

6 [AS8866] 62.73.102.118 0.742 ms

7 [AS51859] 185.167.144.56 1.737 ms

8 [AS51859] 185.167.144.33 0.931 ms

9 [AS51859] 213.91.181.10 0.921 ms

Measurement taken from

IPinfo ProbeNet in Sofia, BG

On December 28th 2025

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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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