`simrf.com`

DNSSEC	⚠️ Not signed
A	3.211.230.19^{🇺🇸 Amazon3.208.0.0/12 EC2 IAD prefix}
		PTR	`ec2-3-211-230-19.compute-1.amazonaws.com`
A	52.204.188.243^{🇺🇸 Amazon52.200.0.0/13 EC2 IAD 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=1783075791

Same first word

simrf.com

Similar names

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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.biz

fmisr.com

sfirm.ru

firms.jp

firms.pl

firms.com.au

firms.asia

firms.in

firms.city

firms.kz

mrifs.com

firms.us

firms.bz

firms.com

srimf.com

fsrim.cn

sfirm.com

sfirm.at

srifm.info

firms.cc

DNS History

50 records (6 active, 44 former)

●NSns-1303.awsdns-34.org2026-03-14 → 2026-07-03 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-07-03 10:55:00

●NSns-2022.awsdns-60.co.uk2026-03-14 → 2026-07-03 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-07-03 10:55:00

●NSns-31.awsdns-03.com2026-03-14 → 2026-07-03 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-07-03 10:55:00

●NSns-733.awsdns-27.net2026-03-14 → 2026-07-03 · 3 obs

○ 2016-07-30 19:35:22
● 2026-03-14 04:23:46
● 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

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

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2026-07-03 10:55:00

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

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2026-07-03 10:55:00

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

● 2015-05-02 20:39:50
○ 2015-10-12 01:28:40
○ 2026-07-03 10:55:00

○A100.50.115.2042026-05-08 → 2026-05-08 · 4 obs

○ 2026-05-02 18:56:02
● 2026-05-08 02:51:06
○ 2026-05-25 14:09:08
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A18.235.229.2502026-06-22 → 2026-06-22 · 4 obs

○ 2026-06-19 12:44:04
● 2026-06-22 05:16:34
○ 2026-06-23 09:53:44
○ 2026-07-03 10:55:00

●A3.211.230.192026-07-03 → 2026-07-03 · 3 obs

○ 2026-06-29 23:19:42
● 2026-07-03 08:29:58
● 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A3.220.156.1242026-06-23 → 2026-06-23 · 4 obs

○ 2026-06-22 05:16:34
● 2026-06-23 09:53:44
○ 2026-06-29 23:19:42
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A34.192.124.1372026-06-29 → 2026-06-29 · 4 obs

○ 2026-06-23 09:53:44
● 2026-06-29 23:19:42
○ 2026-07-03 08:29:58
○ 2026-07-03 10:55:00

○A34.202.67.342026-06-01 → 2026-06-01 · 4 obs

○ 2026-05-25 14:09:08
● 2026-06-01 02:29:18
○ 2026-06-02 18:17:38
○ 2026-07-03 10:55:00

○A34.203.164.912026-06-29 → 2026-06-29 · 4 obs

○ 2026-06-23 09:53:44
● 2026-06-29 23:19:42
○ 2026-07-03 08:29:58
○ 2026-07-03 10:55:00

○A34.230.229.152026-05-02 → 2026-05-02 · 5 obs

○ 2026-04-27 16:51:40
● 2026-05-02 10:55:24
● 2026-05-02 18:56:02
○ 2026-05-08 02:51:06
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A35.171.222.1162026-06-16 → 2026-06-16 · 4 obs

○ 2026-06-13 18:29:44
● 2026-06-16 11:29:10
○ 2026-06-19 12:44:04
○ 2026-07-03 10:55:00

○A35.172.71.1372026-06-16 → 2026-06-16 · 4 obs

○ 2026-06-13 18:29:44
● 2026-06-16 11:29:10
○ 2026-06-19 12:44:04
○ 2026-07-03 10:55:00

○A44.205.87.452026-04-24 → 2026-04-27 · 5 obs

○ 2026-04-16 02:11:44
● 2026-04-24 01:51:26
● 2026-04-27 16:51:40
○ 2026-05-02 10:55:24
○ 2026-07-03 10:55:00

○A44.208.229.792026-06-23 → 2026-06-23 · 4 obs

○ 2026-06-22 05:16:34
● 2026-06-23 09:53:44
○ 2026-06-29 23:19:42
○ 2026-07-03 10:55:00

○A50.16.29.2342026-06-02 → 2026-06-09 · 5 obs

○ 2026-06-01 02:29:18
● 2026-06-02 18:17:38
● 2026-06-09 10:02:32
○ 2026-06-13 18:29:44
○ 2026-07-03 10:55:00

○A52.20.48.2412026-06-19 → 2026-06-19 · 4 obs

○ 2026-06-16 11:29:10
● 2026-06-19 12:44:04
○ 2026-06-22 05:16:34
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

●A52.204.188.2432026-07-03 → 2026-07-03 · 3 obs

○ 2026-06-29 23:19:42
● 2026-07-03 08:29:58
● 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A52.205.231.182026-05-25 → 2026-06-01 · 5 obs

○ 2026-05-08 02:51:06
● 2026-05-25 14:09:08
● 2026-06-01 02:29:18
○ 2026-06-02 18:17:38
○ 2026-07-03 10:55:00

○A52.23.75.1792026-06-02 → 2026-06-09 · 5 obs

○ 2026-06-01 02:29:18
● 2026-06-02 18:17:38
● 2026-06-09 10:02:32
○ 2026-06-13 18:29:44
○ 2026-07-03 10:55:00

○A52.45.217.2312026-04-24 → 2026-05-02 · 5 obs

○ 2026-04-16 02:11:44
● 2026-04-24 01:51:26
● 2026-05-02 18:56:02
○ 2026-05-08 02:51:06
○ 2026-07-03 10:55:00

○A52.5.162.2222026-06-22 → 2026-06-22 · 4 obs

○ 2026-06-19 12:44:04
● 2026-06-22 05:16:34
○ 2026-06-23 09:53:44
○ 2026-07-03 10:55:00

○A52.55.6.1322026-06-13 → 2026-06-13 · 4 obs

○ 2026-06-09 10:02:32
● 2026-06-13 18:29:44
○ 2026-06-16 11:29:10
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A54.224.205.962026-06-13 → 2026-06-13 · 4 obs

○ 2026-06-09 10:02:32
● 2026-06-13 18:29:44
○ 2026-06-16 11:29:10
○ 2026-07-03 10:55:00

○A54.83.137.2532026-06-19 → 2026-06-19 · 4 obs

○ 2026-06-16 11:29:10
● 2026-06-19 12:44:04
○ 2026-06-22 05:16:34
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

○A98.89.101.2152026-05-25 → 2026-05-25 · 4 obs

○ 2026-05-08 02:51:06
● 2026-05-25 14:09:08
○ 2026-06-01 02:29:18
○ 2026-07-03 10:55:00

○A98.90.13.2172026-05-08 → 2026-05-08 · 4 obs

○ 2026-05-02 18:56:02
● 2026-05-08 02:51:06
○ 2026-05-25 14:09:08
○ 2026-07-03 10:55:00

○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
○ 2026-07-03 10:55:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
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:205.251.192.31

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: 262ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`3.211.230.19, 52.204.188.243`
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 resolves to the IP addresses 3.211.230.19 and 52.204.188.243

Additional host names — www.simscape.com, parallelmatlab.net, matlabexamples.com and two others — share IP numbers with simrf.com.

Name Servers

simrf.com has four authoritative 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 has at least partial name server overlap with other domains, such as imert.org, seoradar.com, trimblemep.cloud and two others.

ns-31.awsdns-03.com, ns-733.awsdns-27.net, ns-1303.awsdns-34.org and ns-2022.awsdns-60.co.uk all point to exactly two IP numbers each: ns-31.awsdns-03.com → 205.251.192.31 and 2600:9000:5300:1f00::1; ns-733.awsdns-27.net → 205.251.194.221 and 2600:9000:5302:dd00::1; ns-1303.awsdns-34.org → 205.251.197.23 and 2600:9000:5305:1700::1; ns-2022.awsdns-60.co.uk → 205.251.199.230 and 2600:9000:5307:e600::1.

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`