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Get started for freeName | OptoNet Communication, spol. s.r.o. |
Country | |
Website | |
Hosted domains | 2,245 |
IPv4 addresses | 8,192 |
IPv6 addresses | 7.92 × 10²⁸ |
ASN type | ISP |
Registry | RIPE |
Allocated | 18 years ago on Aug 20, 2007 |
Updated | 4 months ago on Mar 16, 2026 |
ASHandle: █████ OrgID: █████ ASName: ██████ ASNumber: AS█████ RegDate: ████-██-██ Updated: ████-██-██ TechHandle: ████-████ Source: ████
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 AS43542 at robtex.
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Use our data visualization tool to create a visual overview of multiple IPs.
Try Summarize IPsBelow is a recent traceroute taken from the IPinfo ProbeNet to an IP in this ASN. Learn more.Traceroute →
IPinfo ProbeNet in Prague, CZ20 IPs in this ASN replied to an ICMP ping during our most recent internet scan. Learn more
| IP Address | ASN | Details |
|---|---|---|
| 78.156.137.105Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.85ms from Prague, CZ |
| 78.156.143.25Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.86ms from Prague, CZ |
| 2a00:d940:3:2000::1Ping | AS43542OptoNet Communication, spol. s.r.o. | 2.93ms from Prague, CZ |
| 78.156.158.162Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.83ms from Prague, CZ |
| 2a00:d940:2:2:c000::Ping | AS43542OptoNet Communication, spol. s.r.o. | 2.10ms from Prague, CZ |
| 78.156.128.17Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.83ms from Prague, CZ |
| 78.156.144.20Ping | AS43542OptoNet Communication, spol. s.r.o. | 2.78ms from Prague, CZ |
| 2a00:d940:0:b::4Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.87ms from Prague, CZ |
| 78.156.159.246Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.86ms from Prague, CZ |
| 78.156.157.73Ping | AS43542OptoNet Communication, spol. s.r.o. | 1.82ms from Prague, CZ |
| IP Address | ASN | Details |
|---|
| 35.85.118.214Ping | AS16509Amazon.com, Inc. | 0.39ms from Boardman, US |
| 86.59.141.246Ping | AS5483Magyar Telekom Plc. | 4.89ms from Budapest, HU |
| 197.51.76.198Ping | AS8452TE-AS | 8.62ms from Cairo, EG |
| 108.196.74.214Ping | AS7018AT&T Enterprises, LLC | 9.90ms from Chicago, US |
| 200.186.41.150Ping | AS3549Level 3 Parent, LLC | 0.18ms from Lima, PE |
| 183.177.51.86Ping | AS15830Equinix (EMEA) Acquisition Enterprises B.V. | 0.53ms from Melbourne, AU |
| 71.26.106.134Ping | AS7922Comcast Cable Communications, LLC | 5.21ms from Miami, US |
| 187.54.176.150Ping | AS8167V tal | 2.37ms from Novo Hamburgo, BR |
| 218.57.19.38Ping | AS4837CHINA UNICOM China169 Backbone | 1.05ms from Qingdao, CN |
| 45.87.28.22Ping | AS3170VeloxServ Communications Ltd | 0.36ms from Redditch, GB |
A pronounced day/night rhythm — the signature of a consumer/eyeball network whose users sleep at night.
| Netblock | Company | Num of IPs |
|---|---|---|
OptoNet Communication, spol. s.r.o. | 8,192 |
IPs in this network linked to physical places, based on their Wi-Fi networks.
Hotel3
Campground2
Restaurant1| Category | In AS43542 | Example IP |
|---|---|---|
| Hotel | 3 | 78.156.129.142 |
| Campground | 2 | 78.156.133.2 |
| Restaurant | 1 | 78.156.133.237 |
| Stadium | 1 | 78.156.144.245 |
| Grocery Store | 1 | 78.156.133.234 |
IPinfo Places identifies hotels, airports, stadiums, and more with building-level precision.
Explore PlacesThere are 35 peers for this ASN.
| ASN | Name | Rank |
|---|---|---|
| AS1764 | Next Layer Telekommunikationsdienstleistungs- und Beratungs GmbH | |
| AS4455 | IX Reach Ltd | |
| AS6204 | INTERKVM HOST SRL | |
| AS6663 | Euroweb Romania S.R.L. | |
| AS6855 | Slovak Telekom, a.s. | |
| AS6881 | NIX.CZ z.s.p.o. | |
| AS6939 | Hurricane Electric LLC | |
| AS8218 | Zayo Infrastructure France SA | |
| AS9498 | BHARTI Airtel Ltd. | |
| AS12735 | TurkNet Iletisim Hizmetleri A.S. |
| 78.156.128.81 | Jihlava, Czechia |
| 78.156.128.83 | Jihlava, Czechia |
| 78.156.128.102 | Jihlava, Czechia |
| 78.156.128.126 | Jihlava, Czechia |
| 78.156.150.2 | Pacov, Czechia |
| 78.156.128.26 | Jihlava, Czechia |
| 78.156.128.9 | Jihlava, Czechia |
| 78.156.128.74 | Jihlava, Czechia |
| 78.156.156.94 | Jihlava, Czechia |
| 2a00:d940:0:13::2 | Prague, Czechia |
How consistently this network's IPs hold their geolocation. Read relative to the network type, not as a quality score.
There are 2,245 domain names hosted across 50 IP addresses on this ASN.
| IP Address | Domain | Count |
|---|---|---|
| 78.156.158.199 | 858 | |
| 78.156.158.200 | 515 | |
| 78.156.158.194 | 306 | |
| 78.156.158.75 | 200 | |
| 78.156.156.10 | 112 |
