BGP Full View — RIPE RIS RRC00data as of 2026-10-07 18:18

Source: data.ris.ripe.net/rrc00/latest-bview.gz (MRT TABLE_DUMP_V2). For each announced prefix — the distinct origin ASN(s).
🗺 IPv4 address-space map → 📊 ASN TOP →
thank you!
IPv4 prefixes
1 162 005
IPv4 origin ASNs
79 264
IPv4 MOAS
5 941
IPv6 prefixes
267 936
IPv6 origin ASNs
37 521
IPv6 MOAS
1 060

IPv4 prefixes by size /1–/24 only, excl. /0 default

MaskPrefixesAddresses
/8 16
268 435 456
/9 14
117 440 512
/10 39
163 577 856
/11 97
203 423 744
/12 305
319 815 680
/13 593
310 902 784
/14 1 206
316 145 664
/15 2 188
286 785 536
/16 13 971
915 603 456
/17 8 699
285 048 832
/18 14 044
230 096 896
/19 26 762
219 234 304
/20 48 463
198 504 448
/21 56 939
116 611 072
/22 118 476
121 319 424
/23 121 407
62 160 384
/24 743 607
190 363 392
Total 1 156 826 4 325 469 440
BGP /24 coverage of total IPv4 space
Announced in BGP 3 136 616 960 addr 73.03%
Not announced 1 158 350 336 addr 26.97%
↳ technical / special-use (not meant to be announced) 592 642 048 addr 51.16%
↳ routable but not announced 565 708 288 addr 48.84%
    — of total IPv4 space 13.17%
    — of announceable space (total − tech/reserved) 15.28%
Context
Total IPv4 /24 blocks 16 777 216 /24
Reserved + tech /24 (0/8, 10/8, 127/8, 224–255/8, 100.64/10, 169.254/16, 172.16/12, 192.168/16, …) 2 315 269 /24 13.80%
Of those, announced anyway (bogon leaks) 261 /24 0.01%

IPv6 prefixes by size /1–/48 only, addresses as /48 site-counts

MaskPrefixes/48 subnets
/6 1
4 398 046 511 104
/16 1
4 294 967 296
/19 1
536 870 912
/20 15
4 026 531 840
/21 3
402 653 184
/22 6
402 653 184
/23 6
201 326 592
/24 51
855 638 016
/25 13
109 051 904
/26 21
88 080 384
/27 19
39 845 888
/28 169
177 209 344
/29 5 862
3 073 376 256
/30 737
193 200 128
/31 388
50 855 936
/32 27 374
1 793 982 464
/33 6 071
198 934 528
/34 5 732
93 913 088
/35 2 010
16 465 920
/36 10 134
41 508 864
/37 1 382
2 830 336
/38 2 817
2 884 608
/39 1 888
966 656
/40 24 843
6 359 808
/41 1 858
237 824
/42 2 965
189 760
/43 1 476
47 232
/44 27 156
434 496
/45 4 929
39 432
/46 6 551
26 204
/47 9 494
18 988
/48 123 736
123 736
Total 267 709 4 414 657 735 912
IPv4 (1 162 005) IPv6 (267 936)
Reset
Found 4 718 IPv4 prefixes · ASN: AS18403 · showing 4501–4718
# Prefix ↑ Mask Range Origin ASN MOAS
4501 183.80.206.0/24 /24 183.80.206.0 – 183.80.206.255 AS18403 1
4502 183.80.207.0/24 /24 183.80.207.0 – 183.80.207.255 AS18403 1
4503 183.80.208.0/20 /20 183.80.208.0 – 183.80.223.255 AS18403 1
4504 183.80.208.0/24 /24 183.80.208.0 – 183.80.208.255 AS18403 1
4505 183.80.209.0/24 /24 183.80.209.0 – 183.80.209.255 AS18403 1
4506 183.80.210.0/24 /24 183.80.210.0 – 183.80.210.255 AS18403 1
4507 183.80.211.0/24 /24 183.80.211.0 – 183.80.211.255 AS18403 1
4508 183.80.212.0/22 /22 183.80.212.0 – 183.80.215.255 AS18403 1
4509 183.80.216.0/24 /24 183.80.216.0 – 183.80.216.255 AS18403 1
4510 183.80.217.0/24 /24 183.80.217.0 – 183.80.217.255 AS18403 1
4511 183.80.218.0/24 /24 183.80.218.0 – 183.80.218.255 AS18403 1
4512 183.80.219.0/24 /24 183.80.219.0 – 183.80.219.255 AS18403 1
4513 183.80.221.0/24 /24 183.80.221.0 – 183.80.221.255 AS18403 1
4514 183.80.224.0/20 /20 183.80.224.0 – 183.80.239.255 AS18403 1
4515 183.80.225.0/24 /24 183.80.225.0 – 183.80.225.255 AS18403 1
4516 183.80.226.0/24 /24 183.80.226.0 – 183.80.226.255 AS18403 1
4517 183.80.227.0/24 /24 183.80.227.0 – 183.80.227.255 AS18403 1
4518 183.80.228.0/24 /24 183.80.228.0 – 183.80.228.255 AS18403 1
4519 183.80.229.0/24 /24 183.80.229.0 – 183.80.229.255 AS18403 1
4520 183.80.230.0/23 /23 183.80.230.0 – 183.80.231.255 AS18403 1
4521 183.80.232.0/23 /23 183.80.232.0 – 183.80.233.255 AS18403 1
4522 183.80.234.0/24 /24 183.80.234.0 – 183.80.234.255 AS18403 1
4523 183.80.236.0/24 /24 183.80.236.0 – 183.80.236.255 AS18403 1
4524 183.80.237.0/24 /24 183.80.237.0 – 183.80.237.255 AS18403 1
4525 183.80.238.0/24 /24 183.80.238.0 – 183.80.238.255 AS18403 1
4526 183.80.239.0/24 /24 183.80.239.0 – 183.80.239.255 AS18403 1
4527 183.80.240.0/20 /20 183.80.240.0 – 183.80.255.255 AS18403 1
4528 183.80.240.0/24 /24 183.80.240.0 – 183.80.240.255 AS18403 1
4529 183.80.241.0/24 /24 183.80.241.0 – 183.80.241.255 AS18403 1
4530 183.80.242.0/24 /24 183.80.242.0 – 183.80.242.255 AS18403 1
4531 183.80.243.0/24 /24 183.80.243.0 – 183.80.243.255 AS18403 1
4532 183.80.244.0/23 /23 183.80.244.0 – 183.80.245.255 AS18403 1
4533 183.80.248.0/22 /22 183.80.248.0 – 183.80.251.255 AS18403 1
4534 183.80.252.0/24 /24 183.80.252.0 – 183.80.252.255 AS18403 1
4535 183.80.253.0/24 /24 183.80.253.0 – 183.80.253.255 AS18403 1
4536 183.80.254.0/24 /24 183.80.254.0 – 183.80.254.255 AS18403 1
4537 183.80.255.0/24 /24 183.80.255.0 – 183.80.255.255 AS18403 1
4538 183.81.0.0/17 /17 183.81.0.0 – 183.81.127.255 AS18403 1
4539 183.81.0.0/18 /18 183.81.0.0 – 183.81.63.255 AS18403 1
4540 183.81.0.0/20 /20 183.81.0.0 – 183.81.15.255 AS18403 1
4541 183.81.0.0/24 /24 183.81.0.0 – 183.81.0.255 AS18403 1
4542 183.81.1.0/24 /24 183.81.1.0 – 183.81.1.255 AS18403 1
4543 183.81.2.0/24 /24 183.81.2.0 – 183.81.2.255 AS18403 1
4544 183.81.3.0/24 /24 183.81.3.0 – 183.81.3.255 AS18403 1
4545 183.81.4.0/24 /24 183.81.4.0 – 183.81.4.255 AS18403 1
4546 183.81.5.0/24 /24 183.81.5.0 – 183.81.5.255 AS18403 1
4547 183.81.6.0/23 /23 183.81.6.0 – 183.81.7.255 AS18403 1
4548 183.81.8.0/24 /24 183.81.8.0 – 183.81.8.255 AS18403 1
4549 183.81.9.0/24 /24 183.81.9.0 – 183.81.9.255 AS18403 1
4550 183.81.10.0/23 /23 183.81.10.0 – 183.81.11.255 AS18403 1
4551 183.81.12.0/24 /24 183.81.12.0 – 183.81.12.255 AS18403 1
4552 183.81.15.0/24 /24 183.81.15.0 – 183.81.15.255 AS18403 1
4553 183.81.16.0/20 /20 183.81.16.0 – 183.81.31.255 AS18403 1
4554 183.81.16.0/24 /24 183.81.16.0 – 183.81.16.255 AS18403 1
4555 183.81.17.0/24 /24 183.81.17.0 – 183.81.17.255 AS18403 1
4556 183.81.18.0/23 /23 183.81.18.0 – 183.81.19.255 AS18403 1
4557 183.81.20.0/24 /24 183.81.20.0 – 183.81.20.255 AS18403 1
4558 183.81.21.0/24 /24 183.81.21.0 – 183.81.21.255 AS18403 1
4559 183.81.22.0/23 /23 183.81.22.0 – 183.81.23.255 AS18403 1
4560 183.81.24.0/24 /24 183.81.24.0 – 183.81.24.255 AS18403 1
4561 183.81.25.0/24 /24 183.81.25.0 – 183.81.25.255 AS18403 1
4562 183.81.26.0/24 /24 183.81.26.0 – 183.81.26.255 AS18403 1
4563 183.81.27.0/24 /24 183.81.27.0 – 183.81.27.255 AS18403 1
4564 183.81.28.0/24 /24 183.81.28.0 – 183.81.28.255 AS18403 1
4565 183.81.29.0/24 /24 183.81.29.0 – 183.81.29.255 AS18403 1
4566 183.81.30.0/24 /24 183.81.30.0 – 183.81.30.255 AS18403 1
4567 183.81.31.0/24 /24 183.81.31.0 – 183.81.31.255 AS18403 1
4568 183.81.32.0/20 /20 183.81.32.0 – 183.81.47.255 AS18403 1
4569 183.81.33.0/24 /24 183.81.33.0 – 183.81.33.255 AS18403 1
4570 183.81.35.0/24 /24 183.81.35.0 – 183.81.35.255 AS18403 1
4571 183.81.37.0/24 /24 183.81.37.0 – 183.81.37.255 AS18403 1
4572 183.81.39.0/24 /24 183.81.39.0 – 183.81.39.255 AS18403 1
4573 183.81.40.0/24 /24 183.81.40.0 – 183.81.40.255 AS18403 1
4574 183.81.41.0/24 /24 183.81.41.0 – 183.81.41.255 AS18403 1
4575 183.81.46.0/23 /23 183.81.46.0 – 183.81.47.255 AS18403 1
4576 183.81.48.0/20 /20 183.81.48.0 – 183.81.63.255 AS18403 1
4577 183.81.48.0/24 /24 183.81.48.0 – 183.81.48.255 AS18403 1
4578 183.81.49.0/24 /24 183.81.49.0 – 183.81.49.255 AS18403 1
4579 183.81.50.0/24 /24 183.81.50.0 – 183.81.50.255 AS18403 1
4580 183.81.51.0/24 /24 183.81.51.0 – 183.81.51.255 AS18403 1
4581 183.81.54.0/24 /24 183.81.54.0 – 183.81.54.255 AS18403 1
4582 183.81.55.0/24 /24 183.81.55.0 – 183.81.55.255 AS18403 1
4583 183.81.56.0/24 /24 183.81.56.0 – 183.81.56.255 AS18403 1
4584 183.81.57.0/24 /24 183.81.57.0 – 183.81.57.255 AS18403 1
4585 183.81.58.0/24 /24 183.81.58.0 – 183.81.58.255 AS18403 1
4586 183.81.60.0/24 /24 183.81.60.0 – 183.81.60.255 AS18403 1
4587 183.81.61.0/24 /24 183.81.61.0 – 183.81.61.255 AS18403 1
4588 183.81.62.0/24 /24 183.81.62.0 – 183.81.62.255 AS18403 1
4589 183.81.63.0/24 /24 183.81.63.0 – 183.81.63.255 AS18403 1
4590 183.81.64.0/18 /18 183.81.64.0 – 183.81.127.255 AS18403 1
4591 183.81.64.0/20 /20 183.81.64.0 – 183.81.79.255 AS18403 1
4592 183.81.64.0/24 /24 183.81.64.0 – 183.81.64.255 AS18403 1
4593 183.81.65.0/24 /24 183.81.65.0 – 183.81.65.255 AS18403 1
4594 183.81.66.0/24 /24 183.81.66.0 – 183.81.66.255 AS18403 1
4595 183.81.67.0/24 /24 183.81.67.0 – 183.81.67.255 AS18403 1
4596 183.81.68.0/24 /24 183.81.68.0 – 183.81.68.255 AS18403 1
4597 183.81.69.0/24 /24 183.81.69.0 – 183.81.69.255 AS18403 1
4598 183.81.70.0/24 /24 183.81.70.0 – 183.81.70.255 AS18403 1
4599 183.81.71.0/24 /24 183.81.71.0 – 183.81.71.255 AS18403 1
4600 183.81.73.0/24 /24 183.81.73.0 – 183.81.73.255 AS18403 1
4601 183.81.74.0/24 /24 183.81.74.0 – 183.81.74.255 AS18403 1
4602 183.81.75.0/24 /24 183.81.75.0 – 183.81.75.255 AS18403 1
4603 183.81.76.0/24 /24 183.81.76.0 – 183.81.76.255 AS18403 1
4604 183.81.78.0/24 /24 183.81.78.0 – 183.81.78.255 AS18403 1
4605 183.81.79.0/24 /24 183.81.79.0 – 183.81.79.255 AS18403 1
4606 183.81.80.0/20 /20 183.81.80.0 – 183.81.95.255 AS18403 1
4607 183.81.81.0/24 /24 183.81.81.0 – 183.81.81.255 AS18403 1
4608 183.81.84.0/24 /24 183.81.84.0 – 183.81.84.255 AS18403 1
4609 183.81.86.0/23 /23 183.81.86.0 – 183.81.87.255 AS18403 1
4610 183.81.86.0/24 /24 183.81.86.0 – 183.81.86.255 AS18403 1
4611 183.81.87.0/24 /24 183.81.87.0 – 183.81.87.255 AS18403 1
4612 183.81.89.0/24 /24 183.81.89.0 – 183.81.89.255 AS18403 1
4613 183.81.90.0/24 /24 183.81.90.0 – 183.81.90.255 AS18403 1
4614 183.81.91.0/24 /24 183.81.91.0 – 183.81.91.255 AS18403 1
4615 183.81.93.0/24 /24 183.81.93.0 – 183.81.93.255 AS18403 1
4616 183.81.94.0/24 /24 183.81.94.0 – 183.81.94.255 AS18403 1
4617 183.81.95.0/24 /24 183.81.95.0 – 183.81.95.255 AS18403 1
4618 183.81.96.0/20 /20 183.81.96.0 – 183.81.111.255 AS18403 1
4619 183.81.96.0/24 /24 183.81.96.0 – 183.81.96.255 AS18403 1
4620 183.81.98.0/24 /24 183.81.98.0 – 183.81.98.255 AS18403 1
4621 183.81.99.0/24 /24 183.81.99.0 – 183.81.99.255 AS18403 1
4622 183.81.100.0/24 /24 183.81.100.0 – 183.81.100.255 AS18403 1
4623 183.81.101.0/24 /24 183.81.101.0 – 183.81.101.255 AS18403 1
4624 183.81.103.0/24 /24 183.81.103.0 – 183.81.103.255 AS18403 1
4625 183.81.104.0/24 /24 183.81.104.0 – 183.81.104.255 AS18403 1
4626 183.81.105.0/24 /24 183.81.105.0 – 183.81.105.255 AS18403 1
4627 183.81.106.0/23 /23 183.81.106.0 – 183.81.107.255 AS18403 1
4628 183.81.108.0/23 /23 183.81.108.0 – 183.81.109.255 AS18403 1
4629 183.81.110.0/24 /24 183.81.110.0 – 183.81.110.255 AS18403 1
4630 183.81.111.0/24 /24 183.81.111.0 – 183.81.111.255 AS18403 1
4631 183.81.112.0/20 /20 183.81.112.0 – 183.81.127.255 AS18403 1
4632 183.81.112.0/24 /24 183.81.112.0 – 183.81.112.255 AS18403 1
4633 183.81.113.0/24 /24 183.81.113.0 – 183.81.113.255 AS18403 1
4634 183.81.115.0/24 /24 183.81.115.0 – 183.81.115.255 AS18403 1
4635 183.81.116.0/23 /23 183.81.116.0 – 183.81.117.255 AS18403 1
4636 183.81.118.0/24 /24 183.81.118.0 – 183.81.118.255 AS18403 1
4637 183.81.120.0/22 /22 183.81.120.0 – 183.81.123.255 AS18403 1
4638 183.81.124.0/23 /23 183.81.124.0 – 183.81.125.255 AS18403 1
4639 183.81.126.0/23 /23 183.81.126.0 – 183.81.127.255 AS18403 1
4640 203.191.8.0/21 /21 203.191.8.0 – 203.191.15.255 AS18403 1
4641 203.191.8.0/24 /24 203.191.8.0 – 203.191.8.255 AS18403 1
4642 203.191.9.0/24 /24 203.191.9.0 – 203.191.9.255 AS18403 1
4643 203.191.10.0/24 /24 203.191.10.0 – 203.191.10.255 AS18403 1
4644 203.191.11.0/24 /24 203.191.11.0 – 203.191.11.255 AS18403 1
4645 210.245.0.0/17 /17 210.245.0.0 – 210.245.127.255 AS18403 1
4646 210.245.0.0/18 /18 210.245.0.0 – 210.245.63.255 AS18403 1
4647 210.245.0.0/21 /21 210.245.0.0 – 210.245.7.255 AS18403 1
4648 210.245.1.0/24 /24 210.245.1.0 – 210.245.1.255 AS18403 1
4649 210.245.2.0/24 /24 210.245.2.0 – 210.245.2.255 AS18403 1
4650 210.245.3.0/24 /24 210.245.3.0 – 210.245.3.255 AS18403 1
4651 210.245.4.0/24 /24 210.245.4.0 – 210.245.4.255 AS18403 1
4652 210.245.5.0/24 /24 210.245.5.0 – 210.245.5.255 AS18403 1
4653 210.245.6.0/24 /24 210.245.6.0 – 210.245.6.255 AS18403 1
4654 210.245.7.0/24 /24 210.245.7.0 – 210.245.7.255 AS18403 1
4655 210.245.8.0/21 /21 210.245.8.0 – 210.245.15.255 AS18403 1
4656 210.245.9.0/24 /24 210.245.9.0 – 210.245.9.255 AS18403 1
4657 210.245.10.0/24 /24 210.245.10.0 – 210.245.10.255 AS18403 1
4658 210.245.11.0/24 /24 210.245.11.0 – 210.245.11.255 AS18403 1
4659 210.245.12.0/24 /24 210.245.12.0 – 210.245.12.255 AS18403 1
4660 210.245.13.0/24 /24 210.245.13.0 – 210.245.13.255 AS18403 1
4661 210.245.16.0/21 /21 210.245.16.0 – 210.245.23.255 AS18403 1
4662 210.245.16.0/24 /24 210.245.16.0 – 210.245.16.255 AS18403 1
4663 210.245.18.0/24 /24 210.245.18.0 – 210.245.18.255 AS18403 1
4664 210.245.19.0/24 /24 210.245.19.0 – 210.245.19.255 AS18403 1
4665 210.245.22.0/23 /23 210.245.22.0 – 210.245.23.255 AS18403 1
4666 210.245.24.0/21 /21 210.245.24.0 – 210.245.31.255 AS18403 1
4667 210.245.25.0/24 /24 210.245.25.0 – 210.245.25.255 AS18403 1
4668 210.245.26.0/24 /24 210.245.26.0 – 210.245.26.255 AS18403 1
4669 210.245.28.0/24 /24 210.245.28.0 – 210.245.28.255 AS18403 1
4670 210.245.29.0/24 /24 210.245.29.0 – 210.245.29.255 AS18403 1
4671 210.245.30.0/24 /24 210.245.30.0 – 210.245.30.255 AS18403 1
4672 210.245.31.0/24 /24 210.245.31.0 – 210.245.31.255 AS18403 1
4673 210.245.32.0/21 /21 210.245.32.0 – 210.245.39.255 AS18403 1
4674 210.245.34.0/24 /24 210.245.34.0 – 210.245.34.255 AS18403 1
4675 210.245.40.0/21 /21 210.245.40.0 – 210.245.47.255 AS18403 1
4676 210.245.45.0/24 /24 210.245.45.0 – 210.245.45.255 AS18403 1
4677 210.245.47.0/24 /24 210.245.47.0 – 210.245.47.255 AS18403 1
4678 210.245.48.0/21 /21 210.245.48.0 – 210.245.55.255 AS18403 1
4679 210.245.52.0/24 /24 210.245.52.0 – 210.245.52.255 AS18403 1
4680 210.245.53.0/24 /24 210.245.53.0 – 210.245.53.255 AS18403 1
4681 210.245.56.0/21 /21 210.245.56.0 – 210.245.63.255 AS18403 1
4682 210.245.60.0/24 /24 210.245.60.0 – 210.245.60.255 AS18403 1
4683 210.245.64.0/18 /18 210.245.64.0 – 210.245.127.255 AS18403 1
4684 210.245.64.0/21 /21 210.245.64.0 – 210.245.71.255 AS18403 1
4685 210.245.65.0/24 /24 210.245.65.0 – 210.245.65.255 AS18403 1
4686 210.245.70.0/23 /23 210.245.70.0 – 210.245.71.255 AS18403 1
4687 210.245.72.0/21 /21 210.245.72.0 – 210.245.79.255 AS18403 1
4688 210.245.73.0/24 /24 210.245.73.0 – 210.245.73.255 AS18403 1
4689 210.245.78.0/23 /23 210.245.78.0 – 210.245.79.255 AS18403 1
4690 210.245.80.0/21 /21 210.245.80.0 – 210.245.87.255 AS18403 1
4691 210.245.85.0/24 /24 210.245.85.0 – 210.245.85.255 AS18403 1
4692 210.245.86.0/24 /24 210.245.86.0 – 210.245.86.255 AS18403 1
4693 210.245.88.0/21 /21 210.245.88.0 – 210.245.95.255 AS18403 1
4694 210.245.91.0/24 /24 210.245.91.0 – 210.245.91.255 AS18403 1
4695 210.245.92.0/24 /24 210.245.92.0 – 210.245.92.255 AS18403 1
4696 210.245.94.0/24 /24 210.245.94.0 – 210.245.94.255 AS18403 1
4697 210.245.96.0/21 /21 210.245.96.0 – 210.245.103.255 AS18403 1
4698 210.245.96.0/24 /24 210.245.96.0 – 210.245.96.255 AS18403 1
4699 210.245.97.0/24 /24 210.245.97.0 – 210.245.97.255 AS18403 1
4700 210.245.98.0/24 /24 210.245.98.0 – 210.245.98.255 AS18403 1
4701 210.245.99.0/24 /24 210.245.99.0 – 210.245.99.255 AS18403 1
4702 210.245.101.0/24 /24 210.245.101.0 – 210.245.101.255 AS18403 1
4703 210.245.102.0/24 /24 210.245.102.0 – 210.245.102.255 AS18403 1
4704 210.245.103.0/24 /24 210.245.103.0 – 210.245.103.255 AS18403 1
4705 210.245.104.0/21 /21 210.245.104.0 – 210.245.111.255 AS18403 1
4706 210.245.107.0/24 /24 210.245.107.0 – 210.245.107.255 AS18403 1
4707 210.245.111.0/24 /24 210.245.111.0 – 210.245.111.255 AS18403 1
4708 210.245.112.0/21 /21 210.245.112.0 – 210.245.119.255 AS18403 1
4709 210.245.112.0/24 /24 210.245.112.0 – 210.245.112.255 AS18403 1
4710 210.245.113.0/24 /24 210.245.113.0 – 210.245.113.255 AS18403 1
4711 210.245.114.0/24 /24 210.245.114.0 – 210.245.114.255 AS18403 1
4712 210.245.115.0/24 /24 210.245.115.0 – 210.245.115.255 AS18403 1
4713 210.245.116.0/24 /24 210.245.116.0 – 210.245.116.255 AS18403 1
4714 210.245.117.0/24 /24 210.245.117.0 – 210.245.117.255 AS18403 1
4715 210.245.118.0/24 /24 210.245.118.0 – 210.245.118.255 AS18403 1
4716 210.245.119.0/24 /24 210.245.119.0 – 210.245.119.255 AS18403 1
4717 210.245.120.0/21 /21 210.245.120.0 – 210.245.127.255 AS18403 1
4718 218.100.60.0/24 /24 218.100.60.0 – 218.100.60.255 AS18403 1