.zip

TLD SLA Compliance Monitoring

TLD SLA Compliance Metrics

Spec 10

DNS

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 44ms 105ms 210
7d 100% 100% 44ms 107ms 1200
30d 100% 100% 43ms 112ms 4060

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 66ms 84ms 40
7d 100% 100% 67ms 91ms 240
30d 100% 100% 65ms 100ms 824

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% 62ms 63ms 22
7d 100% 61ms 62ms 120
30d 100% 57ms 58ms 408

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 22ms 19 minutes ago local NSID: f345e923f514d2ed79f1a0c… OK
DNS v6 23ms 19 minutes ago local NSID: c9c48e69b31c0b197807522… OK
DNSSEC v4 62ms 54 minutes ago local Key: 37525 OK
DNSSEC v6 63ms 54 minutes ago local Key: 37525 OK
RDAP v4 152ms 1 hour, 1 minute ago local TLS 1.3 OK
RDAP v6 75ms 1 hour, 1 minute ago local TLS 1.3 OK

RDAP HTTPS Timing

75ms total
DNS Lookup
—
TCP Connect
11ms
TLS Handshake
17ms
Time to First Byte
75ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

10 IPs tested
Hostname IP Address AF ASN RPKI Status
ns-tld1.charlestonroadregistry.com 216.239.32.105 v4 AS15169
ns-tld1.charlestonroadregistry.com 2001:4860:4802:32::69 v6 — —
ns-tld2.charlestonroadregistry.com 216.239.34.105 v4 AS15169
ns-tld2.charlestonroadregistry.com 2001:4860:4802:34::69 v6 — —
ns-tld3.charlestonroadregistry.com 216.239.36.105 v4 AS15169
ns-tld3.charlestonroadregistry.com 2001:4860:4802:36::69 v6 — —
ns-tld4.charlestonroadregistry.com 216.239.38.105 v4 AS15169
ns-tld4.charlestonroadregistry.com 2001:4860:4802:38::69 v6 — —
ns-tld5.charlestonroadregistry.com 216.239.60.105 v4 AS43515
ns-tld5.charlestonroadregistry.com 2001:4860:4805::69 v6 — —

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

Test With Your Computer

DNS

dig @ns-tld1.charlestonroadregistry.com zip. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID
drill -D zip. SOA @ns-tld1.charlestonroadregistry.com Alternative using drill with DNSSEC trace

RDAP

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

Registry Information

Active
TLD .zip
Operator Charleston Road Registry Inc.
RDAP Server https://pubapi.registry.google/rdap/ 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 .zip compliance metrics programmatically via our REST API.

Quick Start

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

Example Response

{
  "tld": "zip",
  "display_name": ".zip",
  "operator": "Charleston Road Registry 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://pubapi.registry.google/rdap/"
  },
  "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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