.sina SLA Compliance

TLD SLA Compliance Metrics

Spec 10

DNS

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	70ms	122ms	252
7d	100%	100%	70ms	146ms	1440
30d	100%	100%	71ms	161ms	7984

RDAP

Period	Availability	RTT Compliance	RTT p50	RTT p95	Checks
24h	100%	100%	167ms	170ms	88
7d	100%	100%	167ms	175ms	480
30d	99.92%	99.92%	169ms	176ms	2664

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
24h	100%	141ms	154ms	50
7d	100%	137ms	153ms	300
30d	99.88%	140ms	173ms	1678

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
`DNS`	v4	122ms	15 minutes ago	local	NSID: app8.nrt1.hosts.meta.re…	OK
`DNS`	v6	138ms	55 days, 4 hours ago	local	NSID: app7.nrt1.hosts.meta.re…	OK
`DNSSEC`	v4	47ms	1 hour, 36 minutes ago	local	Key: 39217	OK
`DNSSEC`	v6	61ms	1 hour, 36 minutes ago	local	Key: 39217	OK
`RDAP`	v4	167ms	37 minutes ago	local	TLS 1.3	OK
`RDAP`	v6	164ms	36 minutes ago	local	TLS 1.3	OK

RDAP HTTPS Timing

164ms total

DNS Lookup

—

TCP Connect

47ms

TLS Handshake

52ms

Time to First Byte

164ms

TLS 1.3 / TLS_AES_128_GCM_SHA256

Nameservers

4 IPs tested

Hostname	IP Address	AF	ASN	RPKI
`a0.nic.sina`	`65.22.140.33`	v4	—	—
`a2.nic.sina`	`65.22.143.33`	v4	—	—
`b0.nic.sina`	`65.22.141.33`	v4	—	—
`c0.nic.sina`	`65.22.142.33`	v4	—	—

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

Test With Your Computer

DNS

dig @a0.nic.sina sina. SOA +dnssec +nsid Query SOA with DNSSEC validation and NSID

drill -D sina. SOA @a0.nic.sina Alternative using drill with DNSSEC trace

RDAP

curl -sS "https://rdap.identitydigital.services/rdap/domain/nic.sina" | jq . Fetch RDAP JSON (positive lookup)

curl -I -sS "https://rdap.identitydigital.services/rdap/domain/nic.sina" Headers only (check TLS, timing)

Open in Browser View RDAP response directly

Registry Information

Active

TLD .sina

Operator Sina Corporation

RDAP Server https://rdap.identitydigital.services/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 .sina compliance metrics programmatically via our REST API.

Quick Start

GET /any53/api/v1/compliance/sina/

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

Example Response

{
  "tld": "sina",
  "display_name": ".sina",
  "operator": "Sina Corporation",
  "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.identitydigital.services/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