`spectralcalc.com`

DNSSEC	⚠️ Not signed
A	3.137.46.143^{🇺🇸 Amazon3.136.0.0/13 EC2 CMH prefix}
		PTR	`ec2-3-137-46-143.us-east-2.compute.amazonaws.com`
NS	`bart.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b47^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c147^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`bart.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2147^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`bart.ns.cloudflare.com`
		A	108.162.193.71^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
		A	172.64.33.71^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
		A	173.245.59.71^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`bart.ns.cloudflare.com`
NS	`tessa.ns.cloudflare.com`
		A	2606:4700:50::a29f:26e5^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2e5^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`tessa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22e5^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`tessa.ns.cloudflare.com`
		A	108.162.194.229^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
		A	162.159.38.229^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
		A	172.64.34.229^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`tessa.ns.cloudflare.com`
MX	`mx-01-us-west-2.prod.hydra.sophos.com` ⭐
		A	34.215.37.215^{🇺🇸 Amazon34.208.0.0/12 EC2 PDX prefix}
			PTR	`ec2-34-215-37-215.us-west-2.compute.amazonaws.com`
		A	44.234.222.180^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-234-222-180.us-west-2.compute.amazonaws.com`
		A	50.112.72.129^{🇺🇸 Amazon50.112.0.0/17 EC2 PDX prefix}
			PTR	`ec2-50-112-72-129.us-west-2.compute.amazonaws.com`
MX	`mx-02-us-west-2.prod.hydra.sophos.com`⁽²⁰⁾
		A	34.215.37.215^{🇺🇸 Amazon34.208.0.0/12 EC2 PDX prefix}
			PTR	`ec2-34-215-37-215.us-west-2.compute.amazonaws.com`
		A	44.234.222.180^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
			PTR	`ec2-44-234-222-180.us-west-2.compute.amazonaws.com`
		A	50.112.72.129^{🇺🇸 Amazon50.112.0.0/17 EC2 PDX prefix}
			PTR	`ec2-50-112-72-129.us-west-2.compute.amazonaws.com`
TXT	`sophos-domain-verification=f4fc403ef4f4e23416233b1992f47d0953dc3b96`
TXT	`v=spf1 redirect=spectralcalc.com.spf.sophosdmarc.net -all`
SOA	`bart.ns.cloudflare.com`dns@cloudflare.com serial=2399506869

`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=1774616957

WOT: UNKNOWN (60/100)

Same first word

spectralcalc.com

DNS History

11 records (5 active, 6 former)

●NSbart.ns.cloudflare.com2026-03-01 → 2026-03-27 · 3 obs

○ 2016-09-20 10:29:58
● 2026-03-01 23:33:46
● 2026-03-27 13:34:26

○NSns.gats-inc.com2015-07-16 → 2016-09-20 · 4 obs

● 2015-07-16 08:38:44
● 2016-09-20 10:29:58
○ 2026-03-01 23:33:46
○ 2026-03-27 13:34:26

○NSns1.coxfiber.net2015-07-16 → 2016-09-20 · 4 obs

● 2015-07-16 08:38:44
● 2016-09-20 10:29:58
○ 2026-03-01 23:33:46
○ 2026-03-27 13:34:26

○NSns2.coxfiber.net2015-07-16 → 2016-09-20 · 4 obs

● 2015-07-16 08:38:44
● 2016-09-20 10:29:58
○ 2026-03-01 23:33:46
○ 2026-03-27 13:34:26

●NStessa.ns.cloudflare.com2026-03-01 → 2026-03-27 · 3 obs

○ 2016-09-20 10:29:58
● 2026-03-01 23:33:46
● 2026-03-27 13:34:26

○MXaspmx.l.google.com2015-12-05 → 2016-09-20 · 5 obs

○ 2015-07-16 08:38:44
● 2015-12-05 10:39:18
● 2016-09-20 10:29:58
○ 2026-03-01 23:33:46
○ 2026-03-27 13:34:26

○MXmail.gats-inc.com.spectralcalc.com2015-07-16 → 2016-09-20 · 4 obs

● 2015-07-16 08:38:44
● 2016-09-20 10:29:58
○ 2026-03-01 23:33:46
○ 2026-03-27 13:34:26

●MXmx-01-us-west-2.prod.hydra.sophos.com2026-03-01 → 2026-03-27 · 3 obs

○ 2016-09-20 10:29:58
● 2026-03-01 23:33:46
● 2026-03-27 13:34:26

●MXmx-02-us-west-2.prod.hydra.sophos.com2026-03-01 → 2026-03-27 · 3 obs

○ 2016-09-20 10:29:58
● 2026-03-01 23:33:46
● 2026-03-27 13:34:26

○A216.54.109.292015-07-16 → 2016-09-20 · 4 obs

● 2015-07-16 08:38:44
● 2016-09-20 10:29:58
○ 2026-03-01 23:33:46
○ 2026-03-27 13:34:26

●A3.137.46.1432026-03-01 → 2026-03-27 · 3 obs

○ 2016-09-20 10:29:58
● 2026-03-01 23:33:46
● 2026-03-27 13:34:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, f.gtld-servers.net, h.gtld-servers.net...	-
spectralcalc.com	bart.ns.cloudflare.com, tessa.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.229

NS records: bart.ns.cloudflare.com, tessa.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for spectralcalc.com (unsigned zone)

⏱️ Timing

Total: 213ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`3.137.46.143`
NS	2	`bart.ns.cloudflare.com, tessa.ns.cloudflare.com`
MX	2	`mx-01-us-west-2.prod.hydra.sophos.com (p, mx-02-us-west-2.prod.hydra.sophos.com (p`
TXT	2	`sophos-domain-verification=f4fc403ef4f4e, v=spf1 redirect=spectralcalc.com.spf.sop`
SOA	1	`bart.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (bart.ns.cloudflare.com, bart.ns.cloudflare.com, bart.ns.cloudflare.com...)

Analysis

IP Addresses

spectralcalc.com points to a single IP number: 3.137.46.143.

Name Servers

spectralcalc.com is delegated to two name servers: bart.ns.cloudflare.com and tessa.ns.cloudflare.com.

spectralcalc.com shares the same name server setup as other domains, for example bnbowners.com, timryan.ie, tab-international.com, lessmeeting.com and gats-inc.com.

spectralcalc.com at least partially shares name servers with other domains, for instance rabiesalliance.org, 18jl5.com, janeawilson.com, yearplan.info and boussoleenligne.com.

These name servers are commonly used alongside the name servers elmo.ns.cloudflare.com, hera.ns.cloudflare.com, miles.ns.cloudflare.com, damon.ns.cloudflare.com and maria.ns.cloudflare.com.

Host names with six IP numbers:

bart.ns.cloudflare.com points to: 2606:4700:58::adf5:3b47, 2803:f800:50::6ca2:c147, 2a06:98c1:50::ac40:2147, 108.162.193.71, 172.64.33.71 and 173.245.59.71; tessa.ns.cloudflare.com points to: 2606:4700:50::a29f:26e5, 2803:f800:50::6ca2:c2e5, 2a06:98c1:50::ac40:22e5, 108.162.194.229, 162.159.38.229 and 172.64.34.229.

Mail Servers

spectralcalc.com is handled by two mail servers: mx-01-us-west-2.prod.hydra.sophos.com and mx-02-us-west-2.prod.hydra.sophos.com.

spectralcalc.com shares the same mail server setup as other domains, for instance northlandhospice.org, cremasco.com, cbsa.com.gt, alegrialoteria.com and tcglp.com.

spectralcalc.com shares mail servers with other domains at least partially, including indaabin.gob.mx, 8cubed.net, plantdomaine.com, spectrom.net and apctinc.com.