NTP server stats - ntp.tpa.jeffresc.dev ======================================= this box is a member of pool.ntp.org, serving time on UDP/123 (plain NTP) and TCP/4460 (NTS). these are some live stats, regenerated every few minutes from chronyd, a standing nftables packet counter and a local Prometheus. right now --------- queries/second 6.6k 30-minute average 7.3k 24-hour average 7.4k 7-day average 7.2k bandwidth serving time 467.8 KiB/s (24h avg 518.7 KiB/s) dropped by ceiling 0.0% (30m avg 0.2%) ceiling is 10,000 packets/second our stratum 2 (syncing to navobs1.gatech.edu) transfer since 2026-11-01 ------------------------- sent 187.9 GiB received 198.7 GiB total 386.6 GiB clients ------- distinct IPs seen (approx) 178,708,958 counting since 2026-09-09 = 1 in every 20 routable IPv4 addresses on Earth in chronyd's live client table: 524,288 (table is full; rolling sample) how often the live clients poll us: startup burst (iburst) ## 26213 faster than 1s (!) # 410 1s - 8s ## 20294 16s - 64s ###### 79790 2min - 17min ## 21258 slower than 17min # 518 too new to tell ############################ 375805 GeoIP, top 10 ------------- United States ######################## 473626 (90.3%) China # 18006 ( 3.4%) Russia # 4537 ( 0.9%) United Kingdom # 1999 ( 0.4%) Canada # 1996 ( 0.4%) Germany # 1845 ( 0.4%) Dominican Republic # 1740 ( 0.3%) Mexico # 1562 ( 0.3%) Puerto Rico # 1429 ( 0.3%) Brazil # 1149 ( 0.2%) ASN, top 10 ----------- Comcast Cable Communicat ######################## 60411 (11.5%) Amazon.com, Inc. ###################### 55974 (10.7%) AT&T Enterprises, LLC ############### 37544 ( 7.2%) Charter Communications I ############### 36936 ( 7.0%) Verizon Business ############## 34825 ( 6.6%) Frontier Communications ########### 28566 ( 5.4%) Charter Communications L ####### 18087 ( 3.4%) Cox Communications Inc. ##### 11820 ( 2.3%) Space Exploration Techno #### 10570 ( 2.0%) T-Mobile USA, Inc. #### 9223 ( 1.8%) upstream time sources --------------------- source str reach offset +/- err state --------------------------------------------------------------- navobs1.gatech.edu 1 377 -2.13ms 7.72ms synced tock.usno.navy.mil 1 377 0.36ms 17.03ms combined time-d-g.nist.gov 1 377 5.95ms 22.81ms not combined time-b-b.nist.gov 1 377 -1.53ms 22.31ms not combined bonehed.lcs.mit.edu 1 337 -0.04ms 68.22ms not combined reflector.jeffresc.dev 2 377 2.44ms 30.93ms not combined since chronyd last started (Wed 2026-10-21 19:16:20 EDT) -------------------------------------------------------- NTP packets answered 8,605,945,941 NTP packets received 9,078,121,623 rate-limited 472,175,682 (5.2% of packets) clients affected 4,255 (0.81% of clients) NTS-KE handshakes 7,930 (93 dropped) client log records lost 4,121,944,985 chrony's per-client ratelimit is not packet loss: it sheds only sources polling far faster than any client needs to, and `leak 2` still answers one request in four even for those. A startup `iburst` of 4 packets is never limited. fun numbers ----------- * since the packet counter started, this box has told the time 8,605,604,874 times and served 609.1 GiB of time * a new NTP query lands here every ~152 microseconds. * every NTP exchange here is 76 bytes each way, so answering the whole internet costs less than one photograph per thousand clients. generated 2026-11-05 12:10:28 UTC