`koehlerinstruments.cn`

DNSSEC	⚠️ Not signed
A	154.90.254.206^{🇵🇭 AS398478154.90.224.0/19}
NS	`a1.share-dns.com` ⭐ ⚠️ Not in parent delegation
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`a.share-dns.com` ⚠️ Not in zone NS records
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b.share-dns.net` ⚠️ Not in zone NS records
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b1.share-dns.net` ⚠️ Not in parent delegation
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`a.share-dns.com`master@share-dns.com serial=1751533939

`cn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.cn` ⭐
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2034586299

Same first word

koehlerinstruments.cn

DNS History

9 records (5 active, 4 former)

●NSa.share-dns.com2026-03-25 → 2026-03-25 · 2 obs

○ 2017-03-17 17:16:20
● 2026-03-25 16:18:50

●NSa1.share-dns.com2026-03-25 → 2026-03-25 · 2 obs

○ 2017-03-17 17:16:20
● 2026-03-25 16:18:50

●NSb.share-dns.net2026-03-25 → 2026-03-25 · 2 obs

○ 2017-03-17 17:16:20
● 2026-03-25 16:18:50

●NSb1.share-dns.net2026-03-25 → 2026-03-25 · 2 obs

○ 2017-03-17 17:16:20
● 2026-03-25 16:18:50

○NSns1.koehlerinstruments.cn2015-08-21 → 2017-03-17 · 3 obs

● 2015-08-21 06:56:36
● 2017-03-17 17:16:20
○ 2026-03-25 16:18:50

○MXmail.koehlerinstruments.cn2015-08-21 → 2017-03-17 · 3 obs

● 2015-08-21 06:56:36
● 2017-03-17 17:16:20
○ 2026-03-25 16:18:50

●A154.90.254.2062026-03-25 → 2026-03-25 · 2 obs

○ 2017-03-17 17:16:20
● 2026-03-25 16:18:50

○A47.90.89.1942017-03-17 → 2017-03-17 · 3 obs

○ 2016-07-12 03:30:16
● 2017-03-17 17:16:20
○ 2026-03-25 16:18:50

○A58.96.178.892015-08-21 → 2016-07-12 · 4 obs

● 2015-08-21 06:56:36
● 2016-07-12 03:30:16
○ 2017-03-17 17:16:20
○ 2026-03-25 16:18:50

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
koehlerinstruments.cn	a1.share-dns.com, b1.share-dns.net	-

✅ Authoritative Response

Server:172.64.52.239

NS records: a1.share-dns.com, b1.share-dns.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for koehlerinstruments.cn (unsigned zone)

⏱️ Timing

Total: 636ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`154.90.254.206`
NS	2	`a.share-dns.com, b.share-dns.net`
SOA	1	`a.share-dns.com master.share-dns.com`

Analysis

IP Addresses

koehlerinstruments.cn points to IP number 154.90.254.206.

For instance, other host names kelvatek.com.cn, 51haohaoxue.cn, ahava520.cn, www.51haohaoxue.cn and www.ahava520.cn share IP numbers with koehlerinstruments.cn.

Name Servers

koehlerinstruments.cn is delegated to four name servers: a1.share-dns.com, a.share-dns.com, b1.share-dns.net and b.share-dns.net.

koehlerinstruments.cn shares name servers with other domains at least partially, for example world-trivia.com, la-charpenterie.com, petermourra.com, pafipckotabangil.org and cloudkc.cn.

these name servers are often used with the following: a11.share-dns.com, b11.share-dns.net, a10.share-dns.com, b10.share-dns.net, a6.share-dns.com, b6.share-dns.net, a9.share-dns.com, b9.share-dns.net, a4.share-dns.com and b4.share-dns.net.

Host names with one IP number:

a1.share-dns.com points to: 172.64.53.25.

a.share-dns.com points to: 172.64.53.25.

b1.share-dns.net points to: 172.64.52.239.

b.share-dns.net points to: 172.64.52.239.

Host names pointing to 172.64.53.25: a1.share-dns.com and a.share-dns.com.

Host names pointing to 172.64.52.239: b1.share-dns.net and b.share-dns.net.

koehlerinstruments.cn - robtex.com