Cuba — Caribbean IPv6 Monitor

Total Domains17

DNS (operational)15

Mail (operational)9

Web (operational)8

DNSSEC17

Economy score0.0%

IPv6 pref. %0.01%

BGP networks (routing visibility)

Combines Hurricane Electric BGP route visibility with per-ASN IPv6 preferred from APNIC Labs for economy CU. Rows on HE are green only when IPv6 routes are announced; red when IPv4-only (even if APNIC shows some IPv6 preference). ASNs listed only by APNIC (HE columns N/A) are colored by IPv6 preferred and may not be connected to other ASNs in this economy.

BGP and APNIC per-ASN data for Cuba (CU). Hurricane Electric. APNIC Labs stats.

AS27725	Empresa de Telecomunicaciones de Cuba, S.A.	0.03%	70	5	Yes	100%	valid (10/10 valid)
AS10569	Red CENIAInternet	0.00%	1	1	Yes	0%	unknown (0/2 valid)
AS137409	GSLNETWORKS-AS-AP - GSL Networks Pty LTD	0.00%	N/A	N/A	N/A	10%	invalid (1/10 valid)
AS13335	CLOUDFLARENET - Cloudflare, Inc.	0.00%	N/A	N/A	N/A	80%	invalid (8/10 valid)
AS11960	EMPRESA DE TELECOMUNICACIONES DE CUBA S.A. (IXP CUBA)	0.00%	42	3	Yes	100%	valid (2/2 valid)

Hurricane Electric snapshot 2026-08-03 19:13 UTC (bgp.he.net). APNIC Labs per-ASN snapshot 2026-08-03 19:13 UTC (stats.labs.apnic.net). RPKI columns use RIPEstat on a sample of announced prefixes (not exhaustive ROA coverage).

Detailed IPv6 & DNSSEC Service Interface Statistics

			DNS	Mail	Web	DNSSEC
cubadebate.cu	Cubadebate	Government	[2] 0/0/0 [I]	[1 MX] v4 smtp 1/1/0 v6 smtp 0/0/0 [I]	[0] error: Get "https://www.cubadebate.cu/": read tcp 5.78.118.200:59452->190.205.101.93:443: read: connection reset by peer	U/-/-	reject
cubagob.cu	Gobierno de la República de Cuba	Government	[1] 0/0/0 [I]	[0] -/-/- [-]	[0] error: Get "https://www.cubagob.cu/": dial tcp: lookup www.cubagob.cu on 185.12.64.2:53: no such host	U/-/-	No record
cubasi.cu	CubaSí	Government	[3] 0/0/0 [O]	[0] -/-/- [-]	[1] 0/0/0 [I]	U/-/-	No record
cubatravel.cu	Cuba Travel (turismo oficial)	Government	[6] 0/0/0 [O]	[0] -/-/- [-]	[0] error: Get "https://www.cubatravel.cu/": dial tcp 200.55.183.103:443: connect: no route to host	U/-/-	No record
ecured.cu	EcuRed	Government	[5] 0/0/0 [O]	[1 MX] v4 smtp 1/1/0 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	No record
etecsa.cu	Empresa de Telecomunicaciones de Cuba S.A. (ETECSA)	Telecommunications	[2] 0/0/0 [I]	[2 MX] v4 smtp 2/2/0 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	reject
granma.cu	Granma	Government	[2] 0/0/0 [O]	[3 MX] v4 smtp 3/3/0 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	No record
juventudrebelde.cu	Juventud Rebelde	Government	[2] 0/0/0 [O]	[6 MX] v4 smtp 6/6/6 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	No record
mincom.gob.cu	Ministerio de Comunicaciones	Government	[2] 0/0/0 [M]	[2 MX] v4 smtp 2/2/2 v6 smtp 0/0/0 [O]	[1] 0/0/0 [I]	U/-/-	No record
minrex.gob.cu	Ministerio de Relaciones Exteriores	Government	[2] 0/0/0 [I]	[1 MX] v4 smtp 1/1/1 v6 smtp 0/0/0 [I]	[0] error: Get "https://www.minrex.gob.cu/": tls: failed to verify certificate: x509: certificate has expired or is not yet valid: current time 2026-08-03T19:10:33Z is after 2026-04-05T23:19:06Z	U/-/-	No record
mintur.gob.cu	Ministerio de Turismo	Government	[6] 0/0/0 [M]	[10 MX] v4 smtp 10/10/8 v6 smtp 0/0/0 [M]	[0] error: Get "https://www.mintur.gob.cu/": tls: failed to verify certificate: x509: certificate signed by unknown authority	U/-/-	none
presidencia.gob.cu	Presidencia y Gobierno de la República de Cuba	Government	[3] 0/0/0 [I]	[2 MX] v4 smtp 2/2/2 v6 smtp 0/0/0 [I]	[0] error: Get "https://www.presidencia.gob.cu/": context deadline exceeded	U/-/-	none
radiohc.cu	Radio Habana Cuba	Government	[2] 0/0/0 [O]	[0] -/-/- [-]	[1] 0/0/0 [I]	U/-/-	No record
ucf.edu.cu	Universidad de Cienfuegos	Education	[2] 0/0/0 [I]	[2 MX] v4 smtp 2/2/2 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	reject
uclv.edu.cu	Universidad Central "Marta Abreu" de Las Villas	Education	[2] 0/0/0 [I]	[2 MX] v4 smtp 2/2/2 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	p=reject, sp=none
uh.cu	Universidad de La Habana	Education	[0] -/-/- [-]	[2 MX] v4 smtp 2/2/1 v6 smtp 0/0/0 [I]	[1] 0/0/0 [I]	U/-/-	reject
uho.edu.cu	Universidad de Holguín	Education	[2] 0/0/0 [I]	[1 MX] v4 smtp 1/1/1 v6 smtp 0/0/0 [I]	[0] error: Get "https://www.uho.edu.cu/": dial tcp 200.55.148.26:443: connect: no route to host	U/-/-	p=quarantine, sp=none

Want to suggest a new domain? Submit a pull request for those files in config/domains.

How to Read Results

Each test cell combines a color status and a compact technical summary. The notes below explain both in plain language.

Status and points

IPv4-only No IPv6 operational path observed for this test result. (0 points per column)
Dual-stack Both IPv4 and IPv6 paths are present; IPv6 is available with IPv4. (1 point per column)
IPv6-only IPv6 path is operational for this test result. (1 point per column)
Unknown Measurement was not conclusive or the test was not available. (0 points per column)

Per-test output format

DNS

Format: [NS count] v6 configured/reachable/operational [location]

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

Configured/Reachable/Operational maps to DNS server endpoints discovered from NS records.
Location tags indicate hosting locality context for the tested domain.

Mail

Format: [MX count] v4 smtp configured/reachable/operational v6 smtp configured/reachable/operational [location]

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

v4 and v6 SMTP are measured separately.
MX presence without successful SMTP handshake can still produce non-operational results.

Web

Format: [site count] v6 configured/reachable/operational [location]

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

Configured/Reachable are derived from discovered A/AAAA records on the final web host.
Operational reflects request success by family (tcp4 and tcp6 tested separately).

DNSSEC

Format: S/?/? (partial), U/-/-, or error text

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

S/?/? (partial) indicates partial DNSSEC signal only.
Full chain validation is not yet performed by this checker.

DMARC

Format: policy or p=…, sp=…

Meaning: Published DMARC policy at _dmarc.{domain} (DNS TXT). Shows organizational policy (p=) and subdomain policy (sp=) when set.

No record (NXDOMAIN or no DMARC TXT) scores 0% on the ramp (red).
p=none scores 25%; quarantine 75%; reject 100%. Stricter of p and sp drives the color.
Lookup failures (timeout, SERVFAIL) show grey — not scored as absent.
Does not measure SPF/DKIM pass rates — policy publication only.

Location tag key

[I] Inside: Service hostname is the tested domain or a subdomain under it.
[P] Parent-related: Service hostname resolves via a parent/suffix relationship to the tested domain.
[O] Outside: Service hostname is outside the tested domain suffix.
[M] Mixed: Multiple service hosts span more than one location class.
[-] Not available: No location could be derived from the observed data.

How score is built

Row score: 0-4 points. Row score = DNS + Mail + Web + DNSSEC, where each column contributes 0 or 1 point.

IPv4-only: 0 points
Dual-stack: 1 point
IPv6-only: 1 point
Unknown: 0 points

DNSSEC uses signed=1 point; unsigned, error, and unknown=0 points.

Economy score: Economy deployment score (%) = average(RowScore/4) across domains x 100.

Row score does not include DMARC or RPKI in v1; those columns use the same 0–100% red→green ramp as IPv6 preferred %.

DMARC ramp (domain table)

No DMARC record: 0% — No _dmarc TXT at the domain apex (NXDOMAIN or no v=DMARC1 in answers).
Lookup failed: grey — DNS timeout or non-NXDOMAIN error; use the dmarcian link to re-check.
p=none (monitoring): 25% — Record published; organizational policy is none.
quarantine: 75% — Stricter of p= and sp= is quarantine.
reject: 100% — Stricter of p= and sp= is reject.

RPKI ramp (BGP table)

RPKI %: 0–100% — Share of sampled prefixes RIPEstat marked valid (e.g. 8/10 → 80%). Invalid and unknown prefixes lower the percentage.
RPKI status: text — Worst result in the sample (valid, invalid, or unknown) with counts — use the link for RIPEstat details.
No data: grey — RIPEstat error, no prefixes, or not yet collected.