🌐 Reverse ASN Lookup

Find all domains hosted on this ASN

Every .dk domain whose website address (A record) is announced by AS21859, with the network's IPv6 and DNSSEC adoption and its observed prefixes. An autonomous system is the routing identity of a hosting company or ISP. Data comes from our own scanners, which re-resolve every .dk domain in the zone roughly once a week.

📈 Domains over time#

110 days
112222026-07-012026-08-242026-10-18
2 latest0 over 110 days

Active .dk domains whose website address (A record) is announced by AS21859, counted once a day.

🌐 AS21859 at a glance#

Zenlayer Inc

AS21859 is announced by Zenlayer Inc (United States) and currently hosts 2 .dk domains in our dataset — <0.01% of all scanned .dk domains. Across all our scans we have observed 2 unique IPv4 addresses on this network, and the domains currently sit in 2 IPv4 CIDR blocks covering roughly 3.1 thousand addresses of IPv4 space.

We have yet to observe any IPv6 (AAAA) hosting on this AS.

We have not observed any nameservers or mail exchangers for .dk domains on this AS — the domains hosted here run their DNS and mail from other networks.

On the security side, 0 of the domains hosted here (0.0%) validate as DNSSEC-secure — below the zone-wide average for domains with a web address, 70.5%. See how this AS compares on the ASN statistics page, or drill into the CIDR list below the results.

🛰️ Upstream providers of AS21859#

via ipbot.dk

🔻 Networks using AS21859 as upstream#

43 networks
NetworkNameDomainsPower
AS62610ZEN-DPS - Zenlayer Inc—
100.0%
AS135377Unknown—
77.4%
AS24429Taobao - Zhejiang Taobao Network Co.,Ltd—
29.1%
AS139341ACE-AS-AP - ACE—
19.3%
AS139057ELD-AS-AP - Edgenext Legend Dynasty Pte. Ltd.—
15.7%
AS17497LGHL-AS-AP - Liasail Global Hongkong Limited—
13.0%
AS5065BUNNY-COMMUNICATIONS-GLOBAL - Bunny Communications—
12.7%
AS45903CMCTELECOM-VN - CMC Telecom Infrastructure Company—
7.3%
AS63473HostHatch, LLC—
6.4%
AS52129PROOFPOINT-ASN-EU Proofpoint, Inc.—
6.1%
AS393437KLAYER LLC—
5.1%
AS45102ALIBABA-CN-NET - Alibaba (US) Technology Co., Ltd.36
4.8%
AS137969HKBIL-AS-AP HONG KONG BRIDGE INFO-TECH LIMITED—
4.4%
AS53587AZT - AZURE TECHNOLOGY CO., LIMITED—
4.1%
AS984OWS-NETWORK - OCTOPUS WEB SOLUTION INC—
3.7%
AS29752ZEN-SDN - Zenlayer Inc—
3.5%
AS54113Fastly, Inc.3,388
3.4%
AS137443CHANGLIAN-AS-AP - ChangLian Network Technology Co., Limited—
2.9%
AS132203TENCENT-NET-AP-CN - Tencent Building, Kejizhongyi Avenue—
2.4%
AS64050BGNL-HK BGP Network Limited—
2.2%
AS138995ANTBOX1-AS-AP - Antbox Networks Limited—
2.2%
AS39600BUNNY TECHNOLOGY LLC—
2.0%
AS9516SAKURALINK-AS-AP - SAKURA LINK LIMITED—
1.7%
AS398485DFINITY-NET - DFINITY USA Research, LLC—
1.6%
AS44444Forcepoint-Cloud-AS Forcepoint UK Limited—
1.6%
AS132825MYTEK-AS-AP - MYTEK TRADING PTY LTD—
1.2%
AS200325BunnyCDN BUNNYWAY, informacijske storitve d.o.o.—
1.1%
AS10111ZEONET-AS-AP - Zeofast Network—
1.1%
AS18046DONGFONG-TW - DongFong Technology Co. Ltd.—
1.1%
AS138195MOACKCOLTD-AS-AP - MOACK.Co.LTD—
1.0%
AS149020WEBHORIZON-AS-AP - WebHorizon Internet Services—
1.0%
AS149014BOJINGCOLIMITED-AS-AP - bo jing—
0.9%
AS24173NETNAM-AS-AP - Netnam Company—
0.8%
AS49304SAKURA LINK LIMITED—
0.7%
AS137552TTSB-AS-AP - Terabix—
0.7%
AS979NETLAB-SDN - NetLab Global—
0.3%
AS9957KINX-AS-KR - KINX—
0.3%
AS150706HKZTCL-AS-AP - Hong Kong Zhengxing Technology Co., Ltd.—
0.2%
AS151326DCPL-AS-AP - DCConnect Communication Pte. Ltd.—
0.2%
AS63956INT-5GN-AS-AP - 5G NETWORK OPERATIONS PTY LTD—
0.1%
AS18530Isomedia, Inc.—
0.1%
AS5068STACKSINC-GLOBAL - STACKS INC—
0.1%
AS153259EDG1-AS-IN Edgerede Private Limited—
0.0%

Among the networks we hold ipbot.dk routing data for (the ones looked up on this site), so this is a sample of the AS's customers, not all of them.

Found 2 domains matching 21859
DomainIPASNISP / OrgCountry
b2b.dk 128.1.1.5 AS21859 Zenlayer Inc 🇺🇸 United States
sonoscape.dk 107.151.136.180 AS21859 Zenlayer Inc 🇨🇦 Canada

📡 Known CIDRs#

2 CIDRs
dhd.dk [/] search Domains, Hosts & DNS — .dk zone