holtzman.ca - robtex.com

holtzman.ca

DNSSEC⚠️ Not signed
A69.16.231.58🇺🇸 LiquidWeb69.16.192.0/18 Liquid Web Inc 4210 S. Creyts Rd Lansing, MI 48917
PTRhapoxy01.parklogic.com
NSdns2.domainsatcost.ca ⭐
A54.200.27.218🇺🇸 Amazon54.200.0.0/15 EC2 PDX prefix
PTRdns2.domainsatcost.ca
A54.200.36.148🇺🇸 Amazon54.200.0.0/15 EC2 PDX prefix
PTRdns2.domainsatcost.ca
NSdns.domainsatcost.ca
A54.236.127.131🇺🇸 Amazon54.236.64.0/18 EC2 IAD prefix
PTRdns.domainsatcost.ca
A54.236.210.240🇺🇸 Amazon54.236.128.0/17 EC2 IAD prefix
PTRdns.domainsatcost.ca
MXaspmx.l.google.com ⭐
A2607:f8b0:4004:c23::1b🇺🇸 Google2607:f8b0:4004::/48
PTRyuiadrs-in-f27.1e100.net
A172.253.63.26🇺🇸 Google172.253.63.0/24
PTRbi-in-f26.1e100.net
MXalt1.aspmx.l.google.com(5)
A2607:f8b0:4023:2801::1a🇺🇸 Google2607:f8b0::/32
PTRlcausi-in-f26.1e100.net
A192.178.128.27🇺🇸 Google192.178.128.0/24
PTRlcausi-in-f27.1e100.net
MXalt2.aspmx.l.google.com(5)
A2607:f8b0:4023:1015::1a🇺🇸 Google2607:f8b0::/32
PTRyudfwta-in-f26.1e100.net
A172.253.135.27🇺🇸 Google172.253.135.0/24
PTRyudfwta-in-f27.1e100.net
MXaspmx2.googlemail.com(10)
A2607:f8b0:4023:2801::1a🇺🇸 Google2607:f8b0::/32
PTRlcausi-in-f26.1e100.net
A192.178.128.27🇺🇸 Google192.178.128.0/24
PTRlcausi-in-f27.1e100.net
MXaspmx3.googlemail.com(10)
A2a00:1450:400b:c02::1b🇮🇪 Google2a00:1450:400b::/48
PTRdj-in-f27.1e100.net
A172.253.116.27🇺🇸 Google172.253.116.0/24
PTRdj-in-f27.1e100.net
TXTv=spf1 include:_spf.google.com ~all
TXTgoogle-site-verification=3FYGgZbNWibGk54wptc0xmPNoJb8j3tEIy7rCyIam1E
SOAdns.domainsatcost.canoc@domainsatcost.ca 2026-03-26 #1

ca

DNSSEC🔒 Signed (DS record present)
NSprd-czp-05.corp.cira.ca ⭐
NSany.ca-servers.ca
NSc.ca-servers.ca
NSd.ca-servers.ca
NSj.ca-servers.ca
SOAprd-czp-05.corp.cira.caadmin-dns@cira.ca serial=2603290000

Subdomains

mail.holtzman.ca

Same first word

holtzman.com
holtzman.ca
holtzman.us
holtzman.net

DNS History

10 records (8 active, 2 former)

20162017201820192020202120222023202420252026NSdns.domainsatcost.cadns2.domainsatcost.caMXalt1.aspmx.l.google.comalt2.aspmx.l.google.comaspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comA69.16.231.58172.99.81.16274.200.250.184
●NSdns.domainsatcost.ca2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
●NSdns2.domainsatcost.ca2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
●MXalt1.aspmx.l.google.com2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
●MXalt2.aspmx.l.google.com2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
●MXaspmx.l.google.com2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
●MXaspmx2.googlemail.com2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
●MXaspmx3.googlemail.com2015-08-06 → 2026-03-29 · 2 obs
● 2015-08-06 12:18:38
● 2026-03-29 00:36:14
○A172.99.81.1622015-11-14 → 2017-01-22 · 5 obs
○ 2015-08-06 12:18:38
● 2015-11-14 01:06:16
● 2017-01-22 08:08:20
○ 2018-09-23 12:11:28
○ 2026-03-29 00:36:14
●A69.16.231.582018-09-23 → 2026-03-29 · 3 obs
○ 2017-01-22 08:08:20
● 2018-09-23 12:11:28
● 2026-03-29 00:36:14
○A74.200.250.1842015-08-06 → 2015-08-06 · 3 obs
● 2015-08-06 12:18:38
○ 2015-11-14 01:06:16
○ 2026-03-29 00:36:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
caj.ca-servers.ca, d.ca-servers.ca, c.ca-servers.ca, any.ca-servers.ca-
holtzman.cadns.domainsatcost.ca, dns2.domainsatcost.ca2 records

✅ Authoritative Response

Server:54.200.36.148

NS records: dns.domainsatcost.ca, dns2.domainsatcost.ca

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for holtzman.ca (unsigned zone)

⏱️ Timing

Total: 451ms | Queries: -

📄 Records

TypeCountSample Data
A169.16.231.58
NS2dns2.domainsatcost.ca, dns.domainsatcost.ca
MX5ASPMX3.GOOGLEMAIL.COM (pri: 10), ALT1.ASPMX.L.GOOGLE.COM (pri: 5)...
TXT2google-site-verification=3FYGgZbNWibGk54, v=spf1 include:_spf.google.com ~all
SOA1dns.domainsatcost.ca noc.domainsatcost.c

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (dns.domainsatcost.ca, dns2.domainsatcost.ca)

Analysis

Hierarchy

holtzman.ca is a parent of mail.holtzman.ca.

IP Addresses

holtzman.ca points to a single IP number: 69.16.231.58.

Other host names, for instance mail.holtzman.ca, nabob.severs.ca, protax.ca, scoredeportes.com and 3dtonics.com share IP numbers with holtzman.ca.

Name Servers

Delegation for holtzman.ca rests with two name servers, dns2.domainsatcost.ca and dns.domainsatcost.ca.

holtzman.ca shares the same name server setup as other domains, including bestguide.ca, etfolio.ca, rosspennie.com, tph.education and douvan.net.

holtzman.ca at least partially shares name servers with other domains, for instance quartertones.ca, laurier-optical.com, tranco.us, lwg-ai.ca and comfortaireheatpumps.com.

These name servers are commonly used with dns.rebel.ca and dns2.rebel.ca.

Host names with two IP numbers: dns2.domainsatcost.ca points to 54.200.27.218 and 54.200.36.148; dns.domainsatcost.ca points to 54.236.127.131 and 54.236.210.240.

Mail Servers

holtzman.ca is handled by five mail servers: aspmx2.googlemail.com, aspmx3.googlemail.com, aspmx.l.google.com, alt1.aspmx.l.google.com and alt2.aspmx.l.google.com.

holtzman.ca shares mail servers with other domains at least in part, for instance stjohns-hamilton.school.nz, orglens.com, jambatankedua.com.my, redlmann.at and lstailors.com.

These mail servers are often used with alt3.aspmx.l.google.com, alt4.aspmx.l.google.com, aspmx4.googlemail.com and aspmx5.googlemail.com.

Host names with two IP numbers

Host aspmx2.googlemail.com points to 2607:f8b0:4023:2801::1a and 192.178.128.27

Host aspmx3.googlemail.com points to 2a00:1450:400b:c02::1b and 172.253.116.27

Host aspmx.l.google.com points to 2607:f8b0:4004:c23::1b and 172.253.63.26

Host alt1.aspmx.l.google.com points to 2607:f8b0:4023:2801::1a and 192.178.128.27

Host alt2.aspmx.l.google.com points to 2607:f8b0:4023:1015::1a and 172.253.135.27

Host names that point to 2607:f8b0:4023:2801::1a: aspmx2.googlemail.com and alt1.aspmx.l.google.com

Host names that point to 192.178.128.27: aspmx2.googlemail.com and alt1.aspmx.l.google.com