`simrf.com`

DNSSEC	⚠️ Not signed
A	44.205.87.45^{🇺🇸 Amazon44.192.0.0/11 EC2 IAD prefix}
		PTR	`ec2-44-205-87-45.compute-1.amazonaws.com`
A	52.45.217.231^{🇺🇸 Amazon52.44.0.0/15 EC2 Region prefix}
NS	`ns-31.awsdns-03.com` ⭐
		A	2600:9000:5300:1f00::1^{🇺🇸 Amazon2600:9000:5300::/48 - CloudFront}
			PTR	`ns-31.awsdns-03.com`
		A	205.251.192.31^{🇺🇸 Amazon205.251.192.0/24 prefix}
			PTR	`ns-31.awsdns-03.com`
NS	`ns-1303.awsdns-34.org`
		A	2600:9000:5305:1700::1^{🇺🇸 Amazon2600:9000:5305::/48 - CloudFront}
			PTR	`ns-1303.awsdns-34.org`
		A	205.251.197.23^{🇺🇸 Amazon205.251.197.0/24 prefix}
			PTR	`ns-1303.awsdns-34.org`
NS	`ns-2022.awsdns-60.co.uk`
		A	2600:9000:5307:e600::1^{🇺🇸 Amazon2600:9000:5307::/48 - CloudFront}
			PTR	`ns-2022.awsdns-60.co.uk`
		A	205.251.199.230^{🇺🇸 Amazon205.251.199.0/24 prefix}
			PTR	`ns-2022.awsdns-60.co.uk`
NS	`ns-733.awsdns-27.net`
		A	2600:9000:5302:dd00::1^{🇺🇸 Amazon2600:9000:5302::/48 - CloudFront}
			PTR	`ns-733.awsdns-27.net`
		A	205.251.194.221^{🇺🇸 Amazon205.251.194.0/24 prefix}
			PTR	`ns-733.awsdns-27.net`
TXT	`v=spf1 -all`
SOA	`ns-31.awsdns-03.com`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=1777007261

Same first word

simrf.com

Similar names

isfrm.de

smrif.com

smfri.org

srifm.com

firms.co.uk

frims.ca

firms.uk

firms.net

firms.ca

rmfsi.com

isfrm.org

smirf.pages.dev

ifrsm.com

mfrsi.com

fmsri.com

firms.org

firms.co

sfirm.de

srimf.sg

firms.de

fsmir.com

firms.cz

ifsrm.com

rmfis.net

firms.cn

firms.biz

fmisr.com

sfirm.ru

firms.jp

firms.com.au

firms.asia

firms.in

firms.city

firms.kz

mrifs.com

firms.us

firms.bz

firms.com

fsrim.cn

sfirm.com

sfirm.at

srifm.info

DNS History

28 records (6 active, 22 former)

●NSns-1303.awsdns-34.org2026-03-14 → 2026-04-24 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-04-24 05:11:18

●NSns-2022.awsdns-60.co.uk2026-03-14 → 2026-04-24 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-04-24 05:11:18

●NSns-31.awsdns-03.com2026-03-14 → 2026-04-24 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-04-24 05:11:18

●NSns-733.awsdns-27.net2026-03-14 → 2026-04-24 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-04-24 05:11:18

○NSns-master.mathworks.com2015-05-02 → 2016-07-30 · 4 obs

● 2015-05-02 20:39:50
● 2016-07-30 19:35:22
○ 2026-03-14 04:23:46
○ 2026-04-24 05:11:18

○NSns.mathworks.com2015-05-02 → 2016-07-30 · 4 obs

● 2015-05-02 20:39:50
● 2016-07-30 19:35:22
○ 2026-03-14 04:23:46
○ 2026-04-24 05:11:18

○NSns2.mathworks.com2015-05-02 → 2016-07-30 · 4 obs

● 2015-05-02 20:39:50
● 2016-07-30 19:35:22
○ 2026-03-14 04:23:46
○ 2026-04-24 05:11:18

○NSns3.mathworks.com2015-05-02 → 2016-07-30 · 4 obs

● 2015-05-02 20:39:50
● 2016-07-30 19:35:22
○ 2026-03-14 04:23:46
○ 2026-04-24 05:11:18

○MXmxgw-ah.mathworks.com2015-05-02 → 2015-05-02 · 3 obs

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2026-04-24 05:11:18

○MXmxgw-ls.mathworks.com2015-05-02 → 2015-05-02 · 3 obs

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2026-04-24 05:11:18

○MXmxgw-uk.mathworks.com2015-05-02 → 2015-05-02 · 3 obs

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2026-04-24 05:11:18

○A107.22.120.1312026-03-16 → 2026-03-16 · 4 obs

○ 2026-03-14 04:23:46
● 2026-03-16 09:32:00
○ 2026-03-18 10:11:58
○ 2026-04-24 05:11:18

○A144.212.130.172015-05-02 → 2016-07-30 · 7 obs

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2015-12-16 15:59:20
● 2016-03-14 20:15:20
● 2016-07-30 19:35:22
○ 2026-03-14 04:23:46
○ 2026-04-24 05:11:18

○A144.212.244.172015-10-12 → 2016-07-30 · 5 obs

○ 2015-05-02 20:39:50
● 2015-10-12 01:28:40
● 2016-07-30 19:35:22
○ 2026-03-14 04:23:46
○ 2026-04-24 05:11:18

○A18.205.148.1402026-03-14 → 2026-03-14 · 4 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
○ 2026-03-16 09:32:00
○ 2026-04-24 05:11:18

○A3.216.37.2072026-04-16 → 2026-04-16 · 4 obs

○ 2026-04-09 10:54:28
● 2026-04-16 02:11:44
○ 2026-04-24 01:51:26
○ 2026-04-24 05:11:18

○A32.194.31.1652026-04-09 → 2026-04-09 · 4 obs

○ 2026-03-28 17:19:28
● 2026-04-09 10:54:28
○ 2026-04-16 02:11:44
○ 2026-04-24 05:11:18

○A34.237.103.1262026-03-27 → 2026-03-28 · 5 obs

○ 2026-03-22 15:59:56
● 2026-03-27 22:51:14
● 2026-03-28 17:19:28
○ 2026-04-09 10:54:28
○ 2026-04-24 05:11:18

○A35.170.226.542026-03-18 → 2026-03-18 · 4 obs

○ 2026-03-16 09:32:00
● 2026-03-18 10:11:58
○ 2026-03-22 15:59:56
○ 2026-04-24 05:11:18

●A44.205.87.452026-04-24 → 2026-04-24 · 3 obs

○ 2026-04-16 02:11:44
● 2026-04-24 01:51:26
● 2026-04-24 05:11:18

○A52.202.217.972026-03-14 → 2026-03-16 · 5 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-03-16 09:32:00
○ 2026-03-18 10:11:58
○ 2026-04-24 05:11:18

○A52.204.117.602026-04-09 → 2026-04-09 · 4 obs

○ 2026-03-28 17:19:28
● 2026-04-09 10:54:28
○ 2026-04-16 02:11:44
○ 2026-04-24 05:11:18

○A52.204.200.1822026-04-16 → 2026-04-16 · 4 obs

○ 2026-04-09 10:54:28
● 2026-04-16 02:11:44
○ 2026-04-24 01:51:26
○ 2026-04-24 05:11:18

●A52.45.217.2312026-04-24 → 2026-04-24 · 3 obs

○ 2026-04-16 02:11:44
● 2026-04-24 01:51:26
● 2026-04-24 05:11:18

○A52.71.104.1282026-03-27 → 2026-03-28 · 5 obs

○ 2026-03-22 15:59:56
● 2026-03-27 22:51:14
● 2026-03-28 17:19:28
○ 2026-04-09 10:54:28
○ 2026-04-24 05:11:18

○A54.157.51.1852026-03-22 → 2026-03-22 · 4 obs

○ 2026-03-18 10:11:58
● 2026-03-22 15:59:56
○ 2026-03-27 22:51:14
○ 2026-04-24 05:11:18

○A98.87.100.2032026-03-22 → 2026-03-22 · 4 obs

○ 2026-03-18 10:11:58
● 2026-03-22 15:59:56
○ 2026-03-27 22:51:14
○ 2026-04-24 05:11:18

○A98.95.226.1832026-03-18 → 2026-03-18 · 4 obs

○ 2026-03-16 09:32:00
● 2026-03-18 10:11:58
○ 2026-03-22 15:59:56
○ 2026-04-24 05:11:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
simrf.com	ns-31.awsdns-03.com, ns-733.awsdns-27.net, ns-1303.awsdns-34.org, ns-2022.awsdns-60.co.uk	2 records

✅ Authoritative Response

Server:205.251.197.23

NS records: ns-31.awsdns-03.com, ns-733.awsdns-27.net, ns-1303.awsdns-34.org, ns-2022.awsdns-60.co.uk

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for simrf.com (unsigned zone)

⏱️ Timing

Total: 420ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`52.45.217.231, 44.205.87.45`
NS	4	`ns-1303.awsdns-34.org, ns-2022.awsdns-60.co.uk...`
TXT	1	`v=spf1 -all`
SOA	1	`ns-31.awsdns-03.com awsdns-hostmaster.am`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns-31.awsdns-03.com, ns-31.awsdns-03.com)

Analysis

IP Addresses

simrf.com points to two IP numbers: 44.205.87.45 and 52.45.217.231.

Other host names such as stateflow.it, stateflow.in, matrixvb.com, mathworks.pro and mathgate.com share IPs with simrf.com.

Name Servers

simrf.com is delegated to four name servers: ns-31.awsdns-03.com, ns-733.awsdns-27.net, ns-1303.awsdns-34.org and ns-2022.awsdns-60.co.uk.

simrf.com at least partially shares name servers with other domains, for instance imert.org, seoradar.com, trimblemep.cloud, alexsmith.org and d3iv4ovk7mp50l.cloudfront.net.

Host names with two IP numbers: ns-31.awsdns-03.com points to 2600:9000:5300:1f00::1 and 205.251.192.31; ns-733.awsdns-27.net points to 2600:9000:5302:dd00::1 and 205.251.194.221; ns-1303.awsdns-34.org points to 2600:9000:5305:1700::1 and 205.251.197.23; ns-2022.awsdns-60.co.uk points to 2600:9000:5307:e600::1 and 205.251.199.230.

simrf.com - robtex.com

simrf.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`simrf.com`

`com`