TLD SLA Compliance Metrics
Spec 10No metrics available yet
Metrics will appear after probes start reporting data. Check back in about an hour.
Current Check Status
Reported by Any53 Probes| Type | AF | RTT | Last Check | Source | Details | Status | TSLAC |
|---|---|---|---|---|---|---|---|
DNS
|
v4 | 46ms | 33 days, 11 hours ago | local | NSID: M-SFO-4 | OK | |
DNSSEC
|
v4 | 18ms | 33 days, 11 hours ago | local | Key: 20326 | OK | |
DNSSEC
|
v6 | 18ms | 33 days, 11 hours ago | local | — | FAIL |
Root Server Details
13 Root ServersThe 13 root servers operated by 12 organizations form the foundation of the DNS hierarchy. We test each server independently over both IPv4 and IPv6.
| Server | Operator | IPv4 RTT | IPv6 RTT | IPv4 NSID | IPv6 NSID | Anchor | Status |
|---|---|---|---|---|---|---|---|
a.root-servers.net |
Verisign | — | — | — | — | — | |
b.root-servers.net |
USC-ISI | — | — | — | — | — | |
c.root-servers.net |
Cogent | — | — | — | — | — | |
d.root-servers.net |
UMD | — | — | — | — | — | |
e.root-servers.net |
NASA | — | — | — | — | — | |
f.root-servers.net |
ISC | — | — | — | — | — | |
g.root-servers.net |
DISA | — | — | — | — | — | |
h.root-servers.net |
US Army | — | — | — | — | — | |
i.root-servers.net |
Netnod | — | — | — | — | — | |
j.root-servers.net |
Verisign | — | — | — | — | — | |
k.root-servers.net |
RIPE NCC | — | — | — | — | — | |
l.root-servers.net |
ICANN | — | — | — | — | — | |
m.root-servers.net |
WIDE | — | — | — | — | — |
NSID (Name Server Identifier) helps identify which anycast instance responded. Anchor validation confirms the DNSSEC root trust anchor matches across address families.
Test With Your Computer
DNS
dig @a.root-servers.net root. SOA +dnssec +nsid
Query SOA with DNSSEC validation and NSID
drill -D root. SOA @a.root-servers.net
Alternative using drill with DNSSEC trace
Registry Information
Active
TLD
Root Zone
Operator
Root Server System
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).
API Access
JSON APIAccess Root Zone compliance metrics programmatically via our REST API.
Quick Start
GET
/any53/api/v1/compliance/root/
curl -H "X-API-Key: ${YOUR_API_KEY}" \
"https://www.any53.com/any53/api/v1/compliance/root/"
Example Response
{
"tld": "root",
"display_name": "Root Zone",
"operator": "Root Server System",
"updated_at": "2026-01-31T12:00:00Z",
"dns": {
"availability_24h": 99.99,
"rtt_p50_ms": 12,
"rtt_p95_ms": 42,
"sla_threshold_ms": 500
},
"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).
Save this key now! It cannot be retrieved later.
Tier:
Rate limit: /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 |