gtt.co.gy — Caribbean IPv6 Monitor

Score1/4

Overall IPv4-only

Collected2026-10-13 16:33 UTC

Measurement estimates from a single vantage point — not a compliance certification. Guidance below is for operators, not an SLA.

Priority next steps

Publish AAAA records for name server: ns1.gtt.co.gy, ns2.gtt.co.gy.
Web measurement was inconclusive or unavailable.
Enable DNSSEC signing and publish a DNSKEY at the apex. Use DNSViz to validate the full chain.
Tighten DMARC toward p=reject when ready. Review on dmarcian.

Checks

DNS

IPv4-only

[2] 0/0/0 [I]

Meaning: Shows how many authoritative name servers exist, and how many IPv6 endpoints are configured, responsive, and operational.

IPv4 2/2/2 · IPv6 0/0/0 · location I

Host	IPv4	IPv6	Probes
`ns1.gtt.co.gy` [I]	190.80.0.41	—	ipv4 190.80.0.41 ok;
`ns2.gtt.co.gy` [I]	190.80.0.42	—	ipv4 190.80.0.42 ok;

📌 Action item(s):

Publish AAAA records for name server: ns1.gtt.co.gy, ns2.gtt.co.gy.

Mail

Dual-stack

[3 MX] v4 smtp 12/12/12 v6 smtp 12/12/12 [O]

Meaning: Shows MX footprint and SMTP health per IP family. Operational means an SMTP banner and EHLO exchange succeeded on port 25.

IPv4 SMTP 12/12/12 · IPv6 12/12/12 · location O

Host	IPv4	IPv6	Probes
`mx404b.atni.com` [O]	52.101.41.125, 52.101.194.4, 52.101.50.10, 52.101.41.198	2a01:111:f403:f909::d, 2a01:111:f403:c902::7, 2a01:111:f403:f804::2, 2a01:111:f403:c92c::	ipv4 52.101.41.125 ok; ipv4 52.101.194.4 ok; ipv4 52.101.50.10 ok; ipv4 52.101.41.198 ok; ipv6 2a01:111:f403:f909::d ok; ipv6 2a01:111:f403:c902::7 ok; ipv6 2a01:111:f403:f804::2 ok; ipv6 2a01:111:f403:c92c:: ok;
`gtt-co-gy.mail.protection.outlook.com` [O]	52.101.60.71, 52.101.41.58, 52.101.9.84, 52.101.60.182	2a01:111:f403:f805::2, 2a01:111:f403:c902::7, 2a01:111:f403:c927::, 2a01:111:f403:f804::3	ipv4 52.101.60.71 ok; ipv4 52.101.41.58 ok; ipv4 52.101.9.84 ok; ipv4 52.101.60.182 ok; ipv6 2a01:111:f403:f805::2 ok; ipv6 2a01:111:f403:c902::7 ok; ipv6 2a01:111:f403:c927:: ok; ipv6 2a01:111:f403:f804::3 ok;
`mx404a.atni.com` [O]	52.101.60.176, 52.101.60.151, 52.101.10.18, 52.101.8.35	2a01:111:f403:c903::3, 2a01:111:f403:f910::1, 2a01:111:f403:c92c::7, 2a01:111:f403:f802::2	ipv4 52.101.60.176 ok; ipv4 52.101.60.151 ok; ipv4 52.101.10.18 ok; ipv4 52.101.8.35 ok; ipv6 2a01:111:f403:c903::3 ok; ipv6 2a01:111:f403:f910::1 ok; ipv6 2a01:111:f403:c92c::7 ok; ipv6 2a01:111:f403:f802::2 ok;

Web

Unknown

[0] error: Get "https://www.gtt.co.gy/": tls: failed to verify certificate: x509: certificate is valid for onecomm.vi, onecomm.gy, onecommgroup.com, *.onecommgroup.com, *.onecomm.gy, *.onecomm.vi, not www.gtt.co.gy

Meaning: Shows IPv6 web endpoint readiness for the discovered HTTPS host. Operational means family-specific HTTPS requests complete successfully.

IPv4 0/0/0 · IPv6 0/0/0 · location -

📌 Action item(s):

Web measurement was inconclusive or unavailable.

DNSSEC

Unsigned

U/-/-

Meaning: Shows whether DNSKEY data is observed at the apex (signed), absent (unsigned), or unavailable due to lookup error.

Apex DNSKEY presence only — not full chain validation.

Analyze on DNSViz

📌 Action item(s):

Enable DNSSEC signing and publish a DNSKEY at the apex. Use DNSViz to validate the full chain.

DMARC

p=quarantine

p=quarantine — published organizational policy. Ask receivers to quarantine failing mail; reject is stronger.

Meaning: Published DMARC policy at _dmarc.gtt.co.gy (DNS TXT). Shows organizational policy (p=) and subdomain policy (sp=) when set.

Record at _dmarc.gtt.co.gy:

v=DMARC1; p=quarantine; rua=mailto:dmarc@gtt.co.gy

Policy publication only — SPF/DKIM not measured. Not part of the 0–4 row score.

Check on dmarcian

📌 Action item(s):

Tighten DMARC toward p=reject when ready. Review on dmarcian.