.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% 43ms 116ms 220
7d 92.37% 92.37% 35ms 118ms 1180
30d 98.36% 98.36% 38ms 118ms 6700

RDAP

Period Availability RTT Compliance RTT p50 RTT p95 Checks TSLAC
24h 100% 100% 108ms 134ms 40
7d 94.74% 94.74% 257ms 308ms 228
30d 99.10% 99.10% 108ms 138ms 1332

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% 59ms 60ms 22
7d 94.92% 53ms 320ms 118
30d 99.10% 56ms 104ms 668

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 21ms 29 minutes ago local NSID: 03b8db5d00f10fce573517e… OK
DNS v6 21ms 29 minutes ago local NSID: 92472fd647fac71809f2f5a… OK
DNSSEC v4 59ms 4 minutes ago local Key: 37525 OK
DNSSEC v6 59ms 4 minutes ago local Key: 37525 OK
RDAP v4 116ms 11 minutes ago local TLS 1.3 OK
RDAP v6 91ms 11 minutes ago local TLS 1.3 OK

RDAP HTTPS Timing

91ms total
DNS Lookup
—
TCP Connect
22ms
TLS Handshake
27ms
Time to First Byte
91ms

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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