.hbo

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 9.0ms 155ms 320
7d 100% 100% 7.0ms 164ms 1800
30d 100% 100% 7.0ms 249ms 10002

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 75.00% 100% 83ms 92ms 40
7d 75.00% 100% 85ms 98ms 240
30d 75.38% 100% 86ms 103ms 1324

DNSSEC Validation Metrics

Registry Agreement Spec 6

DNSSEC is required by the Registry Agreement (Specification 6) but is not part of the Spec 10 SLA. We monitor DNSSEC validation independently.

Period Validation Rate RTT p50 RTT p95 Checks Status
24h 100% 30ms 31ms 64
7d 100% 32ms 35ms 360
30d 100% 32ms 34ms 1962

Unlike Spec 10 services, DNSSEC has no formal availability SLA. Thresholds shown are operational guidelines.

Current Check Status

Reported by Any53 Probes
Type AF RTT Last Check Source Details Status TSLAC
DNS v4 11ms 2 minutes ago local NSID: Auth_Host1.Toronto_Node1 OK
DNS v6 11ms 57 days, 5 hours ago local NSID: Auth_Host2.Toronto_Node1 OK
DNSSEC v4 30ms 26 minutes ago local Key: 32689 OK
DNSSEC v6 30ms 26 minutes ago local Key: 32689 OK
RDAP v4 89ms 10 minutes ago local TLS 1.2 OK
RDAP v6 81ms 10 minutes ago local TLS 1.2 OK

RDAP HTTPS Timing

81ms total
DNS Lookup
—
TCP Connect
19ms
TLS Handshake
42ms
Time to First Byte
81ms

TLS 1.2 / TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256

Nameservers

6 IPs tested
Hostname IP Address AF ASN RPKI Status
a.nic.hbo 37.209.192.9 v4 AS12008
b.nic.hbo 37.209.194.9 v4 AS12008
c.nic.hbo 37.209.196.9 v4 AS12008
ns1.dns.nic.hbo 156.154.144.70 v4 — —
ns2.dns.nic.hbo 156.154.145.70 v4 — —
ns3.dns.nic.hbo 156.154.159.70 v4 — —

Per ICANN Spec 10, we test all delegated nameserver IPs independently.

Test With Your Computer

DNS

dig @a.nic.hbo hbo. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D hbo. SOA @a.nic.hbo Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://rdap.nic.hbo/domain/nic.hbo" | jq . Fetch RDAP JSON (positive lookup)
curl -I -sS "https://rdap.nic.hbo/domain/nic.hbo" Headers only (check TLS, timing)
Open in Browser View RDAP response directly

Registry Information

Active
TLD .hbo
Operator HBO Registry Services, Inc.
RDAP Server https://rdap.nic.hbo/ RDAP Client

ICANN SLA Requirements

Per ICANN Registry Agreement Specification 10:

DNS SLA UDP RTT ≤ 500ms for 95% of queries. Availability: 99% (max 432 min/month downtime).
RDAP SLA RTT ≤ 4000ms for 95% of queries. Availability: 98% (max 864 min/month downtime).

API Access

JSON API

Access .hbo compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/hbo/ 
curl -H "X-API-Key: ${YOUR_API_KEY}" \
  "https://www.any53.com/any53/api/v1/compliance/hbo/"

Example Response

{
  "tld": "hbo",
  "display_name": ".hbo",
  "operator": "HBO Registry Services, Inc.",
  "updated_at": "2026-01-31T12:00:00Z",
  "dns": {
    "availability_24h": 99.99,
    "rtt_p50_ms": 12,
    "rtt_p95_ms": 42,
    "sla_threshold_ms": 500
  },
  "rdds": {
    "protocol": "RDAP",
    "availability_24h": 99.95,
    "rtt_p50_ms": 180,
    "rtt_p95_ms": 412,
    "sla_threshold_ms": 4000
  },
  "servers": {
    "rdap_url": "https://rdap.nic.hbo/"
  },
  "spec10_compliant": true
}

Generate API Key

Get a free API key to start making requests. Provide an email to upgrade to the verified tier (600 requests/hour).

Endpoints

Endpoint Description Tier
GET /compliance/ List all monitored TLDs All
GET /compliance/{tld}/ Current metrics for a TLD All
GET /compliance/{tld}/history/ Historical time-series data Organization
GET /compliance/{tld}/probes/ Per-probe breakdown Organization
POST /compliance/keys/ Generate a new API key No auth

Rate Limits

Tier Rate Limit Features
Anonymous 100/hour Current snapshot, hourly aggregates
Verified 600/hour Current snapshot, hourly aggregates
Organization 6000/hour Historical data, per-minute resolution, per-probe breakdown

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