只用免费数据源能把一个 IP 认到什么程度：9 个源实测，地理位置 5 个 IP 全部对不上

== 数据源清单 ==
  免费  rdap
  免费  team-cymru
  免费  ip-api.com
  商业  ipqualityscore
  商业  proxycheck.io
  商业  abuseipdb
  免费  cloud-ranges
  免费  tor-exits
  免费  rdns
  免费  shodan-internetdb
  免费  ipwho.is
  免费  dnsbl
  合计 12 个，免费 9 个

════ 8.8.8.8
  rdap          1382ms  registry{ netName="GOGL" netRange="8.8.8.0 - 8.8.8.255"
                        cidr="8.8.8.0/24" rir="ARIN" org="Google LLC"
                        abuseEmail="network-abuse@google.com" status=["active"] }
  team-cymru       1ms  asn{ asn=15169 route="8.8.8.0/24"
                        name="GOOGLE - Google LLC, US" country="US" }
  ip-api.com     354ms  geo{ country="US" region="Virginia" city="Ashburn" ... }
                        asn{ asn=15169 org="Google Public DNS" }
                        flags{ isHosting=true }  usageType="hosting"
  rdns             0ms  rdns="dns.google"
  shodan-internetdb 781ms  rdns="dns.google"
                        exposure{ observed=true ports=[53,443] vulns=[] }
  ipwho.is       788ms  geo{ country="US" region="California" city="San Jose" ... }
  dnsbl            8ms  blocklists=[8 个，全部 listed:false]

IP                ip-api.com                 ipwho.is                     直线距离
--------------------------------------------------------------------------------
8.8.8.8           Ashburn, Virginia          San Jose, California          3846 km
1.1.1.1           South Brisbane, QLD        Brisbane, QLD                    2 km
52.95.110.1       New York, NY               Seattle, WA                   3865 km
185.220.101.1     Brandenburg an der Havel   Berlin                          22 km
114.114.114.114   Jinan, Shandong            Nanjing, Jiangsu               535 km
--------------------------------------------------------------------------------
5 个 IP 全部不一致。最小 2 km，最大 3865 km，中位数 535 km

def haversine(la1, lo1, la2, lo2):
    la1, lo1, la2, lo2 = map(radians, (la1, lo1, la2, lo2))
    h = sin((la2-la1)/2)**2 + cos(la1)*cos(la2)*sin((lo2-lo1)/2)**2
    return 2 * 6371 * asin(sqrt(h))

/**
 * 数组顺序即字段优先级：合并时只填补空缺，先到的值不会被后面的覆盖。
 * 注意这里的"先到"指数组顺序，与实际网络返回的先后无关 ——
 * 否则同一个 IP 在不同时刻会因为网络抖动得到不同结果。
 */
const PROVIDERS: Provider[] = [
  rdapProvider,
  cymruProvider,
  ipApiProvider,
  // ...
  ipWhoIsProvider,     // 只作 geo 兜底
  dnsblProvider,
];

/**
 * flags 走 OR 合并：任一源判定为 true 即为 true，undefined 一律忽略。
 *
 * 同时记录每个判定位被几个源确认 —— 代理/VPN 这类高权重判据必须知道
 * 背后站着几家，单源和多源的证据强度差别很大。
 */

"flagAgreement": { "isHosting": 1 },
"countryAgreement": { "agreed": 3, "total": 3 }

"sources": [
  { "name": "rdap",           "kind": "free",       "ok": true,  "ms": 232 },
  { "name": "ipqualityscore", "kind": "commercial", "ok": false, "ms": 0,
    "skipped": "未配置 IPQS_API_KEY" },
  { "name": "abuseipdb",      "kind": "commercial", "ok": false, "ms": 0,
    "skipped": "未配置 ABUSEIPDB_API_KEY" }
],
"risk": { "purity": 78, "confidence": "medium" }

  cloud-ranges  1203ms  报错：云厂商 IP 段仍在加载，本次未参与判定
[cloud-ranges] indexed 26349 prefixes     ← 这行在报错之后才打出来

"blocklists": [
  {"zone": "zen.spamhaus.org",       "label": "Spamhaus ZEN",   "listed": false},
  {"zone": "bl.spamcop.net",         "label": "SpamCop",        "listed": false},
  {"zone": "psbl.surriel.com",       "label": "PSBL",           "listed": false},
  {"zone": "bl.blocklist.de",        "label": "blocklist.de",   "listed": false},
  {"zone": "dnsbl-1.uceprotect.net", "label": "UCEPROTECT L1",  "listed": false},
  {"zone": "all.s5h.net",            "label": "s5h.net",        "listed": false},
  {"zone": "dnsbl.dronebl.org",      "label": "DroneBL",        "listed": false},
  {"zone": "spam.spamrats.com",      "label": "SpamRats",       "listed": false}
]

// 无 PTR 记录是有意义的结论（评分时会计入），不是失败。
return { rdns: res.status === "ok" ? res.records : null };

for (const p of ALL) {
  if (p.kind !== "free") continue;
  const skip = p.skipReason?.({ ip });
  if (skip) { console.log(`  ${p.name} 跳过：${skip}`); continue; }
  const t0 = Date.now();
  try {
    const slice = await p.run({ ip });
    console.log(`  ${p.name} ${Date.now() - t0}ms  ${summarize(slice)}`);
  } catch (e) {
    console.log(`  ${p.name} ${Date.now() - t0}ms  报错：${(e as Error).message}`);
  }
}