🛡️Domain Reputation CheckBlocklist, phishing & malware status→

`otstring.com`

DNSSEC	⚠️ Not signed
A	18.239.168.45^{🇺🇸 Amazon18.239.168.0/23}
		PTR	`server-18-239-168-45.bos50.r.cloudfront.net`
A	18.239.168.92^{🇺🇸 Amazon18.239.168.0/23}
A	18.239.168.93^{🇺🇸 Amazon18.239.168.0/23}
A	18.239.168.101^{🇺🇸 Amazon18.239.168.0/23}
NS	`ns-1219.awsdns-24.org` ⭐
		A	2600:9000:5304:c300::1^{🇺🇸 Amazon2600:9000:5304::/48 - CloudFront}
			PTR	`ns-1219.awsdns-24.org`
		A	205.251.196.195^{🇺🇸 Amazon205.251.196.0/24 prefix}
			PTR	`ns-1219.awsdns-24.org`
NS	`ns-135.awsdns-16.com`
		A	2600:9000:5300:8700::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-135.awsdns-16.com`
		A	205.251.192.135^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-135.awsdns-16.com`
NS	`ns-1745.awsdns-26.co.uk`
		A	2600:9000:5306:d100::1^{🇺🇸 Amazon2600:9000:5306::/48 - CloudFront}
			PTR	`ns-1745.awsdns-26.co.uk`
		A	205.251.198.209^{🇺🇸 Amazon205.251.198.0/24 prefix}
			PTR	`ns-1745.awsdns-26.co.uk`
NS	`ns-946.awsdns-54.net`
		A	2600:9000:5303:b200::1^{🇺🇸 Amazon2600:9000:5303::/48 - CloudFront}
			PTR	`ns-946.awsdns-54.net`
		A	205.251.195.178^{🇺🇸 Amazon205.251.195.0/24 prefix}
			PTR	`ns-946.awsdns-54.net`
MX	`mx1.feishu.cn` ⭐
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
MX	`mx2.feishu.cn`⁽⁵⁾
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
MX	`mx3.feishu.cn`⁽¹⁰⁾
		A	52.220.106.220^{🇸🇬 Amazon52.220.0.0/15 SIN prefix}
			PTR	`ec2-52-220-106-220.ap-southeast-1.compute.amazonaws.com`
		A	101.126.58.225^{🇨🇳 VOLCANO-ENGINE101.126.56.0/21 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	122.14.229.0^{🇨🇳 CHINAMOBILE-CN122.14.224.0/20}
TXT	`google-site-verification=G9QXGTdygJ4dd46PmLyhg5PlxCgy7OjtdNRmCTnsvMI`
TXT	`v=spf1 +include:_netblocks.m.feishu.cn -all`
TXT	`verification-code-site-App_feishu=pbcZcdNrXqskQt43scxk`
SOA	`ns-1219.awsdns-24.org`awsdns-hostmaster@amazon.com serial=1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1793501116

Same first word

otstring.com

Similar names

Previous names

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DNS History

19 records (11 active, 8 former)

●NSns-1219.awsdns-24.org2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●NSns-135.awsdns-16.com2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●NSns-1745.awsdns-26.co.uk2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●NSns-946.awsdns-54.net2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●MXmx1.feishu.cn2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●MXmx2.feishu.cn2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●MXmx3.feishu.cn2026-09-29 → 2026-11-01 · 2 obs

● 2026-09-29 22:35:48
● 2026-11-01 03:23:00

●A18.239.168.1012026-10-22 → 2026-11-01 · 5 obs

○ 2026-10-21 10:55:36
● 2026-10-22 00:24:42
○ 2026-10-26 11:24:46
● 2026-11-01 03:22:56
● 2026-11-01 03:23:00

●A18.239.168.452026-10-22 → 2026-11-01 · 5 obs

○ 2026-10-21 10:55:36
● 2026-10-22 00:24:42
○ 2026-10-26 11:24:46
● 2026-11-01 03:22:56
● 2026-11-01 03:23:00

●A18.239.168.922026-10-22 → 2026-11-01 · 5 obs

○ 2026-10-21 10:55:36
● 2026-10-22 00:24:42
○ 2026-10-26 11:24:46
● 2026-11-01 03:22:56
● 2026-11-01 03:23:00

●A18.239.168.932026-10-22 → 2026-11-01 · 5 obs

○ 2026-10-21 10:55:36
● 2026-10-22 00:24:42
○ 2026-10-26 11:24:46
● 2026-11-01 03:22:56
● 2026-11-01 03:23:00

○A52.85.118.292026-09-29 → 2026-10-26 · 5 obs

● 2026-09-29 22:35:48
○ 2026-10-21 10:55:36
● 2026-10-26 11:24:46
○ 2026-11-01 03:22:56
○ 2026-11-01 03:23:00

○A52.85.118.302026-09-29 → 2026-10-26 · 5 obs

● 2026-09-29 22:35:48
○ 2026-10-21 10:55:36
● 2026-10-26 11:24:46
○ 2026-11-01 03:22:56
○ 2026-11-01 03:23:00

○A52.85.118.572026-09-29 → 2026-10-26 · 5 obs

● 2026-09-29 22:35:48
○ 2026-10-21 10:55:36
● 2026-10-26 11:24:46
○ 2026-11-01 03:22:56
○ 2026-11-01 03:23:00

○A52.85.118.82026-09-29 → 2026-10-26 · 5 obs

● 2026-09-29 22:35:48
○ 2026-10-21 10:55:36
● 2026-10-26 11:24:46
○ 2026-11-01 03:22:56
○ 2026-11-01 03:23:00

○A99.84.215.122026-10-21 → 2026-10-21 · 4 obs

○ 2026-09-29 22:35:48
● 2026-10-21 10:55:36
○ 2026-10-22 00:24:42
○ 2026-11-01 03:23:00

○A99.84.215.272026-10-21 → 2026-10-21 · 4 obs

○ 2026-09-29 22:35:48
● 2026-10-21 10:55:36
○ 2026-10-22 00:24:42
○ 2026-11-01 03:23:00

○A99.84.215.302026-10-21 → 2026-10-21 · 4 obs

○ 2026-09-29 22:35:48
● 2026-10-21 10:55:36
○ 2026-10-22 00:24:42
○ 2026-11-01 03:23:00

○A99.84.215.902026-10-21 → 2026-10-21 · 4 obs

○ 2026-09-29 22:35:48
● 2026-10-21 10:55:36
○ 2026-10-22 00:24:42
○ 2026-11-01 03:23:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
otstring.com	ns-135.awsdns-16.com, ns-946.awsdns-54.net, ns-1745.awsdns-26.co.uk, ns-1219.awsdns-24.org	2 records

✅ Authoritative Response

Server:205.251.192.135

NS records: ns-135.awsdns-16.com, ns-946.awsdns-54.net, ns-1745.awsdns-26.co.uk, ns-1219.awsdns-24.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for otstring.com (unsigned zone)

⏱️ Timing

Total: 1096ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`18.239.168.45, 18.239.168.93...`
NS	4	`ns-1219.awsdns-24.org, ns-135.awsdns-16.com...`
MX	3	`mx1.feishu.cn (pri: 1), mx3.feishu.cn (pri: 10)...`
TXT	3	`google-site-verification=G9QXGTdygJ4dd46, v=spf1 +include:_netblocks.m.feishu.cn -...`
SOA	1	`ns-1219.awsdns-24.org awsdns-hostmaster.`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-135.awsdns-16.com, ns-135.awsdns-16.com)

Analysis

IP Addresses

otstring.com resolves to four IP addresses: 18.239.168.45, 18.239.168.92, 18.239.168.93 and 18.239.168.101.

Name Servers

Four name servers handle the delegation for otstring.com: ns-135.awsdns-16.com, ns-946.awsdns-54.net, ns-1219.awsdns-24.org and ns-1745.awsdns-26.co.uk.

otstring.com partially shares its NS delegation with several other domains, including fritzgiftsetc.com, botsablyai.com, vigilzorg.nl and two others.

ns-135.awsdns-16.com, ns-946.awsdns-54.net, ns-1219.awsdns-24.org and ns-1745.awsdns-26.co.uk each carry two IP addresses. ns-135.awsdns-16.com has 205.251.192.135 and 2600:9000:5300:8700::1; ns-946.awsdns-54.net has 205.251.195.178 and 2600:9000:5303:b200::1; ns-1219.awsdns-24.org has 205.251.196.195 and 2600:9000:5304:c300::1; ns-1745.awsdns-26.co.uk has 205.251.198.209 and 2600:9000:5306:d100::1.

Mail Servers

otstring.com uses three mail servers — mx1.feishu.cn, mx2.feishu.cn and mx3.feishu.cn.

At least some of the mail servers used by otstring.com are shared with other domains: lamimosabeauty.com, zdjjtech.com, techpodfest.com and two others among them.

Host names carrying three IP numbers:

mx3.feishu.cn resolves to 52.220.106.220, 101.126.58.225 and 122.14.229.0.

Host names pointing to two IP addresses:

mx2.feishu.cn resolves to 101.126.58.225 and 122.14.229.0.

Host names resolving to a single IP address:

mx1.feishu.cn resolves to 52.220.106.220.

The host names mx3.feishu.cn and mx1.feishu.cn both resolve to 52.220.106.220 IP addresses.

The host names mx3.feishu.cn and mx2.feishu.cn both resolve to 101.126.58.225 IP addresses.

The host names mx3.feishu.cn and mx2.feishu.cn both resolve to 122.14.229.0 IP addresses.

otstring.com - robtex.com

otstring.com

com

Same first word

Similar names

Previous names

Next names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`otstring.com`

`com`